Query to search for students by group ID

Hello

I have a table that has 2 columns student_id and Course_id.

Examples of data

Student_id Course_id
-------------------------------
1 > 1
1 > 2
1 > 3
1 > 4
2 > 1
2 > 3
3 > 1
3 > 2
3 > 4
I want to find students who have completed all course 1,3,4.

Try again with the following query.

WITH T AS (SELECT 1 stu_id ,     1 stu_curs FROM DUAL
 UNION ALL
SELECT 1 ,     2 FROM DUAL
 UNION ALL
SELECT 1 ,     3 FROM DUAL
 UNION ALL
SELECT 1 ,     4 FROM DUAL
 UNION ALL
SELECT 2 ,     1 FROM DUAL
 UNION ALL
SELECT 2 ,     3 FROM DUAL
 UNION ALL
SELECT 3 ,     1 FROM DUAL
 UNION ALL
SELECT 3 ,     2 FROM DUAL
 UNION ALL
SELECT 3 ,     4 FROM DUAL
 )
select stu_id from t where stu_curs in (1,3,4) group by stu_id having count(0) = 3;

Tags: Database

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query to search for the user of the application
Hello

What is the query to search for the user of the application in the sql command?

I tried the query below
```
select app_user from dual;
```
```
app_user invalid identifier
```
Thank you.
Hello skud,
The following SQL statement will give you the APP_USER which is an environmental variable in the APEX:
```
SELECT v('APP_USER') FROM DUAL;
```
See if it works. As I used the syntax given in the triggers to record audit trail above and it works fine.
Kiran

Published by: chubby Kiran June 11, 2011 04:08

Published by: chubby Kiran June 11, 2011 04:09

SQL query to search for the line that contains the identifier for each consecutive group

Hello

I'm on 11.2.0.3 Enterprise Edition.

I have a strange request here - do not know if this is possible without going to procedure...

Given these data of the sample:

create table test_status (
  status varchar2(10),
  revision_id number,
  revision_timestamp timestamp);

insert into test_status values ('PROPOSED', 1, systimestamp);
insert into test_status values ('PROPOSED', 2, systimestamp);
insert into test_status values ('PROPOSED', 3, systimestamp);
insert into test_status values ('ACTIVE', 4, systimestamp);
insert into test_status values ('ACTIVE', 5, systimestamp);
insert into test_status values ('PROPOSED', 6, systimestamp);
insert into test_status values ('PROPOSED', 7, systimestamp);
insert into test_status values ('ACTIVE', 8, systimestamp);
insert into test_status values ('ACTIVE', 9, systimestamp);
insert into test_status values ('FINISHED', 10, systimestamp);
insert into test_status values ('FINISHED', 11, systimestamp);
insert into test_status values ('FINISHED', 12, systimestamp);

Gives me:

SQL> select *
  2  from test_status
  3  order by revision_id;


STATUS     REVISION_ID REVISION_TIMESTAMP
---------- ----------- -----------------------------
PROPOSED             1 25-SEP-14 04.49.47.954000 PM
PROPOSED             2 25-SEP-14 04.49.47.962000 PM
PROPOSED             3 25-SEP-14 04.49.47.966000 PM
ACTIVE               4 25-SEP-14 04.49.47.969000 PM
ACTIVE               5 25-SEP-14 04.49.47.972000 PM
PROPOSED             6 25-SEP-14 04.49.47.976000 PM
PROPOSED             7 25-SEP-14 04.49.47.979000 PM
ACTIVE               8 25-SEP-14 04.49.47.982000 PM
ACTIVE               9 25-SEP-14 04.49.47.987000 PM
FINISHED            10 25-SEP-14 04.49.47.991000 PM
FINISHED            11 25-SEP-14 04.49.47.996000 PM
FINISHED            12 25-SEP-14 04.49.48.000000 PM


12 rows selected.
ws selected.

I want to get this result:

STATUS     REVISION_ID REVISION_TIMESTAMP
---------- ----------- ----------------------------
PROPOSED             3 25-SEP-14 04.49.47.966000 PM
ACTIVE               5 25-SEP-14 04.49.47.972000 PM
PROPOSED             7 25-SEP-14 04.49.47.979000 PM
ACTIVE               9 25-SEP-14 04.49.47.987000 PM
FINISHED            12 25-SEP-14 04.49.48.000000 PM

Then query the table ordered by Revision_Id, I would get the line containing the highest revision for each consecutive group of status values. I am able to get the line containing the highest revision for each separate status, value, but I can't deal with the scenario where a state value reappears later. In the case of the real world, it is a workflow and I need to take into account the fact that an element through the workflow may be redirected to the back front she proceeds forward again.

Hope it makes sense.

Thank you

John

Hi, John,.

John OToole (Dublin) wrote:

Hello

I'm on 11.2.0.3 Enterprise Edition.

I have a strange request here - do not know if this is possible without going to procedure...

...

Do not no stinkin' procedure:

WITH got_grp_id AS

(

SELECT the status, revision_id, revision_timestamp

ROW_NUMBER () OVER (ORDER BY revision_id)

-ROW_NUMBER () (PARTITION STATUS

ORDER BY revision_id

) AS grp_id

OF test_status

)

SELECT status

MAX (revision_id) AS revision_id

MAX (revision_timestamp) DUNGEON (DENSE_RANK LAST ORDER BY revision_id)

AS revision_timestamp

OF got_grp_id

GROUP BY status, grp_id

ORDER BY revision_id

;

For an explanation of the technique of Difference sets used here, see

Analytic Question lag and lead and/or

Re: Ranking of queries

Stuck on a sql query to search for records that have the same parent child records

Oracle 10 g 2 Enterprise Edition.

Hello

I'm writing a logic to find records in a parent table, who have the same values in a child table.
This is part of a larger application, but I am stuck on that part for now, so I have mocked some of the below simplified tables to capture the heart of the
the problem is that I'm stuck.
Let's say I have a responsible parent, child employee table table and there are a number of many relationships between them.
The aptly named Join_Table manages the relationship between them. If a manager can manage several employees, an employee can be managed by
many managers.

I have a feeling it's stupidly easy, but it seems to me having a bad episode of brain freeze today!

-- parent table
CREATE TABLE manager (
 id      number primary key,
 name      varchar2(100));

-- child table 
CREATE TABLE employee (
 id          number primary key,
 name      varchar2(100));

-- link table
CREATE TABLE join_table (
 manager_id          NUMBER, 
 employee_id      NUMBER,
 CONSTRAINT join_table_pk PRIMARY KEY (manager_id, employee_id),
 CONSTRAINT manager_fk FOREIGN KEY (manager_id) REFERENCES manager(id),
 CONSTRAINT employee_fk FOREIGN KEY (employee_id) REFERENCES employee(id) 
 );

-- Insert some managers
INSERT INTO manager (id, name) VALUES (1, 'John');
INSERT INTO manager (id, name) VALUES (2, 'Bob');
INSERT INTO manager (id, name) VALUES (3, 'Mary');
INSERT INTO manager (id, name) VALUES (4, 'Sue');
INSERT INTO manager (id, name) VALUES (5, 'Alan');
INSERT INTO manager (id, name) VALUES (6, 'Mike');

-- Insert some employees 
INSERT INTO employee (id, name) VALUES (101, 'Paul');
INSERT INTO employee (id, name) VALUES (102, 'Simon');
INSERT INTO employee (id, name) VALUES (103, 'Ken');
INSERT INTO employee (id, name) VALUES (104, 'Kevin');
INSERT INTO employee (id, name) VALUES (105, 'Jack');
INSERT INTO employee (id, name) VALUES (106, 'Jennifer');
INSERT INTO employee (id, name) VALUES (107, 'Tim');

-- Insert the links
-- John manages Paul, Simon, Ken
INSERT INTO join_table (manager_id, employee_id) VALUES (1, 101);
INSERT INTO join_table (manager_id, employee_id) VALUES (1, 102);
INSERT INTO join_table (manager_id, employee_id) VALUES (1, 103);
-- Bob manages Paul, Simon, Kevin, Jack
INSERT INTO join_table (manager_id, employee_id) VALUES (2, 101);
INSERT INTO join_table (manager_id, employee_id) VALUES (2, 102);
INSERT INTO join_table (manager_id, employee_id) VALUES (2, 104);
INSERT INTO join_table (manager_id, employee_id) VALUES (2, 105);
-- Mary manages Jennifer, Tim
INSERT INTO join_table (manager_id, employee_id) VALUES (3, 106);
INSERT INTO join_table (manager_id, employee_id) VALUES (3, 107);
-- Sue manages Jennifer, Tim
INSERT INTO join_table (manager_id, employee_id) VALUES (4, 106);
INSERT INTO join_table (manager_id, employee_id) VALUES (4, 107);
-- Alan manages Paul, Simon, Ken, Jennifer, Tim
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 101);
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 102);
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 103);
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 106);
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 107);
-- Mike manages Paul, Simon, Ken
INSERT INTO join_table (manager_id, employee_id) VALUES (6, 101);
INSERT INTO join_table (manager_id, employee_id) VALUES (6, 102);
INSERT INTO join_table (manager_id, employee_id) VALUES (6, 103);

-- For sanity
CREATE UNIQUE INDEX employee_name_uidx ON employee(name);

If I ask for Manager John, so I want to find other managers who manage the exact list and even employees.
Answer should be Mike.
If I ask for Manager of Mary, the answer should be Sue.

This query will give me the list of managers who manage some of the same employees as John, but not the same employees accurate...

SELECT DISTINCT m.name AS manager
FROM manager m, join_table jt, employee e
WHERE m.id = jt.manager_id
AND jt.employee_id = e.id
AND e.id IN (
     SELECT e.id
     FROM manager m, join_table jt, employee e
     WHERE m.id = jt.manager_id
     AND jt.employee_id = e.id
     AND m.name = 'John')
ORDER BY 1;

I thought about using set operations to find managers with a list of employees less than my employees is null and where my employees under their list of employees is null. But there must be an easier way more elegant.
Any ideas?
BTW, I need to run as a batch on tables with > 20 million rows so the efficiency of queries is key.

What about...

WITH manager_list AS
(
 SELECT name,
        LTRIM(MAX(SYS_CONNECT_BY_PATH(id,','))
        KEEP (DENSE_RANK LAST ORDER BY curr),',') AS employees
 FROM   (SELECT m.name,
                e.id,
                ROW_NUMBER() OVER (PARTITION BY m.name ORDER BY e.id) AS curr,
                ROW_NUMBER() OVER (PARTITION BY m.name ORDER BY e.id) -1 AS prev
         FROM   manager m,
                join_table jt,
                employee e
  WHERE m.id           = jt.manager_id
  AND   jt.employee_id = e.id
  AND   m.name = :P_MANAGER)
  GROUP BY name
  CONNECT BY prev = PRIOR curr AND name = PRIOR name
  START WITH curr = 1
), all_list AS
(
 SELECT name,
        LTRIM(MAX(SYS_CONNECT_BY_PATH(id,','))
        KEEP (DENSE_RANK LAST ORDER BY curr),',') AS employees
 FROM   (SELECT m.name,
                e.id,
                ROW_NUMBER() OVER (PARTITION BY m.name ORDER BY e.id) AS curr,
                ROW_NUMBER() OVER (PARTITION BY m.name ORDER BY e.id) -1 AS prev
         FROM   manager m,
                join_table jt,
                employee e
  WHERE m.id           = jt.manager_id
  AND   jt.employee_id = e.id)
  GROUP BY name
  CONNECT BY prev = PRIOR curr AND name = PRIOR name
  START WITH curr = 1
)
SELECT a.*
FROM   manager_list m,
       all_list a
WHERE  m.employees = a.employees

Would be easier in 11g, but I do not have a facility here so this is based on 10g.

See you soon

Ben

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"CREATE TABLE"SOS" COMPANY ".

(SELECT "COMPANY_ID" NUMBER (10,0) NOT NULL,)

VARCHAR2 (50 BYTE) "COMPANY."

VARCHAR2 (50 BYTE) "ADDRESS1"

VARCHAR2 (10 BYTE) "ADDRESS2"

VARCHAR2 (40 BYTE) 'CITY ',.

VARCHAR2 (20 BYTE) 'STATE ', HE SAID.

NUMBER (5.0) "ZIP".

) CREATION OF IMMEDIATE SEGMENT

PCTFREE, PCTUSED, INITRANS 40 10 1 MAXTRANS 255 NOCOMPRESS SLAUGHTER

STORAGE (INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645)

PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS USER_TABLES DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT 1)

TABLESPACE 'USERS ';

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Insert into COMPANY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (4, 'SONIC INC', null, null, null, null, null);

Insert into COMPANY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (5, "MSCI", null, null, null, null, null);

Insert into COMPANY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (6, 'ERNEST AND YOUNG', null, null, null, null, null);

Insert into COMPANY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (7, "JOHN DEER", null, null, null, null, null);

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BEGIN

CTX_DDL. CREATE_PREFERENCE ("your_lexer", "BASIC_LEXER");

CTX_DDL. SET_ATTRIBUTE ("your_lexer", "' SKIPJOINS,"., @-"'); -to jump. , @ - ' symbols

END;

/

CREATE INDEX my_index2 ON COMPANY (COMPANY_NAME)

INDEXTYPE IS CTXSYS. CONTEXT IN PARALLEL

PARAMETERS ("LEXER your_lexer");
```
SELECT
company_name
FROM company
WHERE CATSEARCH(company.COMPANY_NAME, 'LLC','') > 0
ORDER BY company.COMPANY_ID;
```
output
company_name
1 LSG SOLUTIONS LLC
2 Properties@Oklahoma, LLC
only 2 rows back but must return 3

It helps if you post a copy and paste of effective enforcement of the full code, including the results. You posted an index of context with the query with catsearch, which requires a ctxcat index. You must be a context clue that you did not post and did not add your lexer to. The following table shows it returns all the lines of 3 as planned using either a with catsearch ctxcat index or a context index with contains, as long that you include the lexer in your create index. You must also be sure that the index is created, or synchronized after inserting or updating data.

Scott@ORCL >-version:

Scott@ORCL > SELECT banner version of v$.

BANNER

--------------------------------------------------------------------------------

Oracle Database 11 g Enterprise Edition Release 11.2.0.1.0 - 64 bit Production

PL/SQL Release 11.2.0.1.0 - Production

CORE 11.2.0.1.0 Production

AMT for 64-bit Windows: Version 11.2.0.1.0 - Production

NLSRTL Version 11.2.0.1.0 - Production

5 selected lines.

Scott@ORCL >-table and the test data:

Scott@ORCL > CREATE TABLE 'SOCIETY '.

2 ("COMPANY_ID" NUMBER (10,0) NULL NOT ACTIVATE,)

3 'COMPANY_NAME' VARCHAR2 (50 BYTE),

VARCHAR2 (50 BYTE) 4 "ADDRESS1"

5 "ADDRESS2" VARCHAR2 (10 BYTE),

VARCHAR2 (40 BYTE) 6 'CITY',

7 VARCHAR2 (20 BYTE) 'STATE ', HE SAID.

NUMBER (5.0) 8 'ZIP '.

(9) THE CREATION OF IMMEDIATE SEGMENT

PCTFREE 10 10 PCTUSED 40 INITRANS, MAXTRANS NOCOMPRESS SLAUGHTER 1 255

11 STORAGE (INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645)

12 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS USER_TABLES DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT 1)

TABLESPACE 13 "USERS."

Table created.

Scott@ORCL > START

2 insert in SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (1, 'LSG SOLUTIONS LLC', null, null, null, null, null);

3 insert in SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (2,' LOVE "S TRAVEL', null, null, null, null, null);

4 insert into SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (3, 'DEVON ENERGY', null, null, null, null, null);

5 insert into SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (4, 'SONIC INC', null, null, null, null, null);

6 insert in SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (5, "MSCI", null, null, null, null, null);

7 insert into SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (6, 'ERNEST AND YOUNG', null, null, null, null, null);

8 insert in SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (7, "JOHN DEER", null, null, null, null, null);

9 insert in SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (8,'Properties@Oklahoma, LLC', null, null, null, null, null);

10 insert into SOCIETY (COMPANY_ID, COMPANY_NAME, Address1, Address2, CITY, STATE, ZIP) values (9, 'D.D.T L.L.C.', null, null, null, null, null);

11 END;

12.

PL/SQL procedure successfully completed.

Scott@ORCL >-lexer:

Scott@ORCL > START

CTX_DDL 2. CREATE_PREFERENCE ("your_lexer", "BASIC_LEXER");

CTX_DDL 3. SET_ATTRIBUTE ("your_lexer", "' SKIPJOINS,"., @-"'); -to jump. , @ - ' symbols

4 END;

5.

PL/SQL procedure successfully completed.

Scott@ORCL >-ctxcat index and using catsearch queries:

Scott@ORCL > CREATE INDEX my_index2 ON COMPANY (COMPANY_NAME)

2 INDEXTYPE IS CTXSYS. CTXCAT PARALLEL

3 PARAMETERS ("LEXER your_lexer");

The index is created.

Scott@ORCL > SELECT

2 company_name

3 the COMPANY

4. WHERE the CATSEARCH (company.COMPANY_NAME, 'LLC', ") > 0

5 ORDER BY company.COMPANY_ID;

COMPANY_NAME

--------------------------------------------------

LSG SOLUTIONS LLC

Properties@Oklahoma, LLC

D.D.T L.L.C.

3 selected lines.

Scott@ORCL >-context and using the query index contains:

Scott@ORCL > CREATE INDEX my_index3 ON COMPANY (COMPANY_NAME)

2 INDEXTYPE IS CTXSYS. CONTEXT IN PARALLEL

3 PARAMETERS ("LEXER your_lexer");

The index is created.

Scott@ORCL > SELECT

2 company_name

3 the COMPANY

4 WHERE CONTAINS (company.COMPANY_NAME, 'LLC') > 0

5 ORDER BY company.COMPANY_ID;

COMPANY_NAME

--------------------------------------------------

LSG SOLUTIONS LLC

Properties@Oklahoma, LLC

D.D.T L.L.C.

3 selected lines.

Using synonyms in the search for name

Hello

I try to use synonyms in an oracle namesearch. Set up a seqarch name as in the second example described in the developer's guide to the oracle text to http://download.oracle.com/docs/cd/E18283_01/text.112/e16594/search.htm application

Now the name, for I am looking can hold one '&', for example 'B & V '.

I would like to find this text when I enter "B & V", B & V' or 'B and V.

I found a thread on how to set up a thesaurus with synonyms for '&' and 'and' to 'and' and ampersand or special characters

Now I'm wondering how to combine this.

Thanks for the help in advance,
Dirk

Your change was correct and it works. For reserved words in the braces enclosing aims to tell Oracle Text as text rather than apply the special meaning they have as reserved words. Since "und" is not a reserved word, it didn't need to be escaped by placing braces. When you set "&", then "und" synonymously as you did the search for 'B und V' correctly found "B and V, as in the modified below demo. In this particular case, the search might work without applying the format_string, but you need to keep it in the query so that it is applied to these values in need, for example, if you searched for "B & V' or 'B & V".

SCOTT@orcl_11gR2> create table emp (
  2        first_name    varchar2(30),
  3        middle_name   varchar2(30),
  4        last_name     varchar2(30),
  5        email            varchar2(30),
  6        phone            varchar2(30));

Table created.

SCOTT@orcl_11gR2> -- added row of data:
SCOTT@orcl_11gR2> set define off
SCOTT@orcl_11gR2> insert into emp values
  2  ('Jane', 'Doe', 'B & V', '[email protected]', '321-654-0987');

1 row created.

SCOTT@orcl_11gR2>
SCOTT@orcl_11gR2> create or replace procedure empuds_proc
  2       (rid in rowid, tlob in out nocopy clob) is
  3         tag varchar2(30);
  4         phone varchar2(30);
  5  begin
  6    for c1 in (select FIRST_NAME, MIDDLE_NAME, LAST_NAME, EMAIL, PHONE
  7              from emp
  8              where rowid = rid)
  9    loop
 10         tag :='';
 11         dbms_lob.writeappend(tlob, length(tag), tag);
 12         if (c1.EMAIL is not null) then
 13             dbms_lob.writeappend(tlob, length(c1.EMAIL), c1.EMAIL);
 14         end if;
 15         tag :='';
 16         dbms_lob.writeappend(tlob, length(tag), tag);
 17         tag :='';
 18         dbms_lob.writeappend(tlob, length(tag), tag);
 19         if (c1.PHONE is not null) then
 20           phone := nvl(REGEXP_SUBSTR(c1.PHONE, '\d\d\d\d($|\s)'), ' ');
 21           dbms_lob.writeappend(tlob, length(phone), phone);
 22         end if;
 23         tag :='';
 24         dbms_lob.writeappend(tlob, length(tag), tag);
 25         tag :='';
 26         dbms_lob.writeappend(tlob, length(tag), tag);
 27         if (c1.FIRST_NAME is not null) then
 28           dbms_lob.writeappend(tlob, length(c1.FIRST_NAME), c1.FIRST_NAME);
 29           dbms_lob.writeappend(tlob, length(' '), ' ');
 30         end if;
 31         if (c1.MIDDLE_NAME is not null) then
 32           dbms_lob.writeappend(tlob, length(c1.MIDDLE_NAME), c1.MIDDLE_NAME);
 33           dbms_lob.writeappend(tlob, length(' '), ' ');
 34         end if;
 35         if (c1.LAST_NAME is not null) then
 36           dbms_lob.writeappend(tlob, length(c1.LAST_NAME), c1.LAST_NAME);
 37         end if;
 38         tag :='';
 39         dbms_lob.writeappend(tlob, length(tag), tag);
 40       end loop;
 41    end;
 42  /

Procedure created.

SCOTT@orcl_11gR2> show errors
No errors.
SCOTT@orcl_11gR2> begin
  2    ctx_ddl.create_preference('empuds', 'user_datastore');
  3    ctx_ddl.set_attribute('empuds', 'procedure', 'empuds_proc');
  4    ctx_ddl.set_attribute('empuds', 'output_type', 'CLOB');
  5  end;
  6  /

PL/SQL procedure successfully completed.

SCOTT@orcl_11gR2> begin
  2    ctx_ddl.create_section_group('namegroup', 'BASIC_SECTION_GROUP');
  3    ctx_ddl.add_ndata_section('namegroup', 'fullname', 'fullname');
  4    ctx_ddl.add_ndata_section('namegroup', 'phone', 'phone');
  5    ctx_ddl.add_ndata_section('namegroup', 'email', 'email');
  6  end;
  7  /

PL/SQL procedure successfully completed.

SCOTT@orcl_11gR2> begin
  2    ctx_thes.create_thesaurus ('nicknames');
  3    ctx_thes.create_relation ('nicknames', 'John', 'syn', 'Jon');
  4  end;
  5  /

PL/SQL procedure successfully completed.

SCOTT@orcl_11gR2>
SCOTT@orcl_11gR2> -- added synonyms to thesaurus:
SCOTT@orcl_11gR2> begin
  2    ctx_thes.create_relation ('nicknames', '&', 'syn', 'and');
  3    ctx_thes.create_relation ('nicknames', '&', 'syn', 'und');
  4  end;
  5  /

PL/SQL procedure successfully completed.

SCOTT@orcl_11gR2>
SCOTT@orcl_11gR2> begin
  2       ctx_ddl.create_preference('NDATA_WL', 'BASIC_WORDLIST');
  3       ctx_ddl.set_attribute('NDATA_WL', 'NDATA_ALTERNATE_SPELLING', 'FALSE');
  4       ctx_ddl.set_attribute('NDATA_WL', 'NDATA_BASE_LETTER', 'TRUE');
  5       ctx_ddl.set_attribute('NDATA_WL', 'NDATA_THESAURUS', 'NICKNAMES');
  6       ctx_ddl.set_attribute('NDATA_WL', 'NDATA_JOIN_PARTICLES',
  7        'de:di:la:da:el:del:qi:abd:los:la:dos:do:an:li:yi:yu:van:jon:un:sai:ben:al');
  8  end;
  9  /

PL/SQL procedure successfully completed.

SCOTT@orcl_11gR2> create index name_idx on emp (first_name)
  2  indextype is ctxsys.context
  3  parameters
  4    ('datastore  empuds
  5        section    group namegroup
  6        wordlist   ndata_wl');

Index created.

SCOTT@orcl_11gR2>
SCOTT@orcl_11gR2> -- added function to format search string:
SCOTT@orcl_11gR2> create or replace function format_string
  2    (p_string in varchar2)
  3    return varchar2
  4  as
  5    v_string     varchar2 (32767) := ' ' || p_string || ' ';
  6  begin
  7    -- add extra spaces around ampersand:
  8    v_string := replace (v_string, '&', ' & ');
  9    -- remove duplciate spaces:
 10    while instr (v_string, '  ') > 0
 11    loop
 12        v_string := replace (v_string, '  ', ' ');
 13    end loop;
 14    -- add { and } around each reserved word:
 15    for r in
 16        (select keyword,
 17             ' ' || keyword || ' ' keyword2
 18         from      v$reserved_words)
 19    loop
 20        v_string := replace (upper (v_string), r.keyword2, ' {' || r.keyword || '} ');
 21    end loop;
 22    return ltrim (rtrim (v_string));
 23  end format_string;
 24  /

Function created.

SCOTT@orcl_11gR2> show errors
No errors.
SCOTT@orcl_11gR2> -- example of usage of function:
SCOTT@orcl_11gR2> select format_string ('B und V') from dual;

FORMAT_STRING('BUNDV')
--------------------------------------------------------------------------------
B UND V

1 row selected.

SCOTT@orcl_11gR2>
SCOTT@orcl_11gR2> -- query modified to apply foramt_string function to :name variable:
SCOTT@orcl_11gR2> var name varchar2(80);
SCOTT@orcl_11gR2> exec :name := 'B und V'

PL/SQL procedure successfully completed.

SCOTT@orcl_11gR2> column first_name  format a10
SCOTT@orcl_11gR2> column middle_name format a11
SCOTT@orcl_11gR2> column last_name   format a9
SCOTT@orcl_11gR2> column phone          format a12
SCOTT@orcl_11gR2> column email          format a22
SCOTT@orcl_11gR2> select first_name, middle_name, last_name, phone, email, scr
  2  from   (select /*+ FIRST_ROWS */
  3                first_name, middle_name, last_name, phone, email, score(1) scr
  4            from   emp
  5            where  contains
  6                  (first_name,
  7                   'ndata (phone,'       || format_string (:name) || ') OR
  8                 ndata (email,'       || format_string (:name) || ') OR
  9                 ndata (fullname,' || format_string (:name) || ')',
 10                   1) > 0
 11            order  by score (1) desc)
 12  where  rownum <= 10;

FIRST_NAME MIDDLE_NAME LAST_NAME PHONE        EMAIL                         SCR
---------- ----------- --------- ------------ ---------------------- ----------
Jane       Doe         B & V     321-654-0987 [email protected]           97

1 row selected.

SCOTT@orcl_11gR2>

Search for an exact match without additional words

Hello world

is it possible to know if a tag contains a certain word or phrase and nothing else? For example the search for all documents with the title "foo" should match all documents containing < title > foo < /title > but not documents containing something like < title > foo bar < / title >. I tried something like "(foo ~ (% ~ foo)) IN the title ' but I get an error"extension of generic query results in terms too", so using a wildcard character is no option here. Any ideas?

Another method would be to use extractvalue to limit lines. He would still use the text index to get the rows with foo inside, then extractvalue would limit only the rows where the word foo is in. Which would eliminate the need for a procedure or user_datastore or increasing the size of the index. Please see the demo below.

SCOTT@orcl_11gR2> create table documents
  2    (text  varchar2 (45))
  3  /

Table created.

SCOTT@orcl_11gR2> insert all
  2  into documents values ('foo')
  3  into documents values ('foo bar')
  4  into documents values ('bar foo')
  5  select * from dual
  6  /

3 rows created.

SCOTT@orcl_11gR2> insert into documents
  2  select '' || object_name || ''
  3  from   all_objects
  4  /

76012 rows created.

SCOTT@orcl_11gR2> create index test_idx
  2  on documents (text)
  3  indextype is ctxsys.context
  4  parameters
  5    ('section group ctxsys.auto_section_group')
  6  /

Index created.

SCOTT@orcl_11gR2> set autotrace on explain
SCOTT@orcl_11gR2> select * from documents d
  2  where  contains (text, 'foo within title') > 0
  3  and    extractvalue (xmltype (d.text), '//title') = 'foo'
  4  /

TEXT
---------------------------------------------
foo

1 row selected.

Execution Plan
----------------------------------------------------------
Plan hash value: 3102160860

-----------------------------------------------------------------------------------------
| Id  | Operation                   | Name      | Rows  | Bytes | Cost (%CPU)| Time     |
-----------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT            |           |     1 |    36 |    10   (0)| 00:00:01 |
|*  1 |  TABLE ACCESS BY INDEX ROWID| DOCUMENTS |     1 |    36 |    10   (0)| 00:00:01 |
|*  2 |   DOMAIN INDEX              | TEST_IDX  |       |       |     4   (0)| 00:00:01 |
-----------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter(EXTRACTVALUE("XMLTYPE"."XMLTYPE"("D"."TEXT"),'//title')='foo')
   2 - access("CTXSYS"."CONTAINS"("TEXT",'foo within title')>0)

Note
-----
   - dynamic sampling used for this statement (level=2)

SCOTT@orcl_11gR2>

Query to search for students by group ID

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