Select the query within the PL/SQL block.

Hello Experts,

I'm just a beginner with PL/SQL.
If I write a select query of client like fire against a database and SQL dev, it gives me result.
For example: select * from employee;

Now suppose that when I use the same query within a PL/SQL block:
Declare
Start
Select * from employee;
end;
/
It gives error during execution, by mentioning that an INTO should etc...
I have my doubts here:
1. is it impossible to use a simple select statement within a PL/SQL block (If yes why?)

I know it's a very basic question, I tried to search it on the forum but could not find the thread, please redirect me to the link if it is already the answer.

Please read this first. may ask why?

http://docs.Oracle.com/CD/B28359_01/AppDev.111/b28370/TOC.htm

Tags: Database

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Hello

I use the PL/SQL block in a compiled and Embedded C Programm with the PRO * C compile. Oracle 10 g 2.

When I select... In a liaison VARCHAR variable, I have to initialize the variable before, otherwise I get an ORA-1458.
Same problem with assignments to VARCHAR variables.

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TNX for your help!

The following test program shows my question:

#include < stdio.h >
#include < string.h >
#include "oraca.h".
#include 'sqlca.h.
#define USER 'scott '.
#define PASSWORD 'tiger '.

int main()
{
EXEC SQL BEGIN DECLARE SECTION;
char * db_user = USER;
char * db_passw = password;
Sysdate_str VARCHAR [64];
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EXEC SQL CONNECT: db_user identified by: db_passw;

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sysdate_str. Len = 1000; / * invalid length * /.
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of the DOUBLE
;
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/ * the following code does not work, sqlcode = - 1458 * /.
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sysdate_str. Len = 1000; / * invalid length * /.
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BEGIN
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Published by: jjaeckel on May 5, 2010 20:37
Hello

This is the behavior documented by my understanding.

Pro * Guide C/C++ programmer, Chapter 7

Host

Note:
To use VARCHAR, MASSILIA, or STRING types as output in PL/SQL blocks host variables, you must initialize the length before entering the block. Set the length to the declared (maximum) length of the VARCHAR, MASSILIA or STRING type.

http://download.Oracle.com/docs/CD/B19306_01/AppDev.102/b14407/pc_07pls.htm#i2336

Kind regards

Mark

to change the pl/sql block to get the value of the user

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PL/SQL Release 10.2.0.1.0 - Production

CORE 10.2.0.1.0 Production

AMT for 32-bit Windows: Version 10.2.0.1.0 - Production

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When exit c1% notfound;

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I'm new to PL/sql and struck PL SQL blocks, please help solve this problem.

declare

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/
```
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```
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I am writing
```
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DECLARE
*
ERROR at line 1:
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/
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Hello

I have a simple table of objects on the map that were inclusive. That is to say:

CREATE TABLE tbl (
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  bb_sw_lng FLOAT, -- SW bounding box corner - Longitude
  bb_ne_lat FLOAT, -- NE bounding box corner - Latitude
  bb_ne_lng FLOAT -- NE bounding box corner - Longitude
);

INSERT INTO tbl VALUES (1, 1, 10, 10, 20, 20);
INSERT INTO tbl values (2, 1, 5, 5, 35, 35);
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I can query the number of entries for a parent entity and the use of aggregate functions calculate the framework encompassing total for the parent entity:

SELECT
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  NVL(MAX(bb_ne_lng),0)
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but the same select cannot be put to the PL/SQL block:

DECLARE
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  sw_lat FLOAT; sw_lng FLOAT; ne_lat FLOAT; ne_lng FLOAT;
BEGIN
  SELECT
    count(*) INTO cnt,
    NVL(MIN(bb_sw_lat),0) INTO sw_lat,    -- ORA-00934: group function is not allowed here
    NVL(MIN(bb_sw_lng),0) INTO sw_lng,
    NVL(MAX(bb_ne_lat),0) INTO ne_lat,
    NVL(MAX(bb_ne_lng),0) INTO ne_lng
  FROM tbl
  WHERE parentId=1;
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can someone please explain to me why and what to do with it? Examples are executable as they are, it should be fairly easy to reproduce.

Thank you very much!

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Published by: user3620664 on May 14, 2009 02:14 added formatting

without testing, just an IN

DECLARE
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BEGIN
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    NVL(MIN(bb_sw_lat),0),
    NVL(MIN(bb_sw_lng),0),
    NVL(MAX(bb_ne_lat),0),
    NVL(MAX(bb_ne_lng),0)
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  sw_lng,
  ne_lat,
  ne_lng
   FROM tbl
  WHERE parentId=1;
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Start
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Now, when I execute the pl/sql block, I get the following error.

PLS-00103: encountered the symbol "TABLE" when the expected in the following way:

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Published by: 969224 on April 23, 2013 08:08
969224 wrote:
Hello guys, I'm trying to truncate a table that includes data using a pl/sql block, so if the table has even a single row then the truncate should run. to do this, I wrote the following code

declare
number num.
Start
Select count (*) in the num from table_name;
If num > 0 then
truncate table table_name;
end if;
end;

Now, when I execute the pl/sql block, I get the following error.

PLS-00103: encountered the symbol "TABLE" when the expected in the following way:

When I run the truncate without pl/sql command, it runs very well.

Can someone please where I'm wrong.

Thank you

Published by: 969224 on April 23, 2013 08:08

DDL is not allowed directly within PL/SQL procedures.

You must (ab) use EXECUTE IMMEDIATE issuing the DDL

SQL query to avoid the PL/SQL

Hello

I'm doing below pl/sql block in a single stm SQL, let me know how could achieve us.

Here I use SELECT * FROM TEMP_ORDER WHERE DB_NAME = V_DBNAME which runs a cursor to get the separate database names.
This V_DBNAME could be avoided? and put everything in a single SQL?

(The PL/SQL block is not running properly because several rows are returned) I would be interested in the SQL solution.

create table TEMP_ORDER
(
  ORD1    VARCHAR2(25),
  ORD2    VARCHAR2(25),
  DB_NAME VARCHAR2(25)
)

INSERT INTO TEMP_ORDER(ORD1,ORD2,DB_NAME) VALUES('A1','FIRST ORDER','DB1');
INSERT INTO TEMP_ORDER(ORD1,ORD2,DB_NAME) VALUES('A2','SECOND ORDER','DB2');
INSERT INTO TEMP_ORDER(ORD1,ORD2,DB_NAME) VALUES('A3','THIRD ORDER','DB1');

create table TEMP_PAYMENT
(
  PAY1    VARCHAR2(25),
  PAY2    VARCHAR2(25),
  DB_NAME VARCHAR2(25)
)
INSERT INTO TEMP_PAYMENT(PAY1,PAY2,DB_NAME) VALUES('A1','FIRST PAYMENT','DB1');
INSERT INTO TEMP_PAYMENT(PAY1,PAY2,DB_NAME) VALUES('A2','SECOND PAYMENT','DB2');
INSERT INTO TEMP_PAYMENT(PAY1,PAY2,DB_NAME) VALUES('A3','THIRD PAYMENT','DB1');

create table TEMP_DELIVER
(
  DEL1    VARCHAR2(25),
  DEL2    VARCHAR2(25),
  DB_NAME VARCHAR2(25)
)
INSERT INTO TEMP_DELIVER(DEL1,DEL2,DB_NAME) VALUES('A1','FIRST DELIVER','DB1');
INSERT INTO TEMP_DELIVER(DEL1,DEL2,DB_NAME) VALUES('A2','SECOND DELIVER','DB2');
INSERT INTO TEMP_DELIVER(DEL1,DEL2,DB_NAME) VALUES('A3','THIRD DELIVER','DB1');


---------------------------------
DECLARE

   V_DBNAME TEMP_ORDER.DB_NAME%TYPE;
   V_ORDER_NAME TEMP_ORDER.ORD2%TYPE;
   V_PAYMENT_NAME TEMP_PAYMENT.PAY2%TYPE;
   V_DELIVER_NAME TEMP_DELIVER.DEL2%TYPE;   
   CURSOR DBCURSOR IS SELECT UNIQUE DB_NAME from TEMP_ORDER;   
   
BEGIN

IF NOT DBCURSOR%ISOPEN THEN
    OPEN DBCURSOR;
END IF;
  
LOOP

FETCH DBCURSOR INTO V_DBNAME;
    EXIT WHEN DBCURSOR%NOTFOUND;
    
    SELECT   A.ORD2, 
             B.PAY2, 
             C.DEL2 INTO V_ORDER_NAME,V_PAYMENT_NAME,V_DELIVER_NAME
    FROM
             (SELECT * FROM TEMP_ORDER   WHERE DB_NAME = V_DBNAME)A,
             (SELECT * FROM TEMP_PAYMENT WHERE DB_NAME = V_DBNAME)B,
             (SELECT * FROM TEMP_DELIVER WHERE DB_NAME = V_DBNAME)C 
    WHERE
             A.ORD1 = B.PAY1 AND
             B.PAY1 = C.DEL1;                 
     
    DBMS_OUTPUT.put_line(V_ORDER_NAME || ':' || V_PAYMENT_NAME || ':' || V_DELIVER_NAME);                     
                          
END LOOP;
CLOSE DBCURSOR;
  
        
END;

Hello

Do you mean something like this?

SELECT
  a.db_name,
  a.ord2 || ':' ||
  b.pay2 || ':' ||
  c.del2 string
FROM
  TEMP_ORDER A,
  TEMP_PAYMENT B,
  TEMP_DELIVER C
WHERE
  A.ORD1 = B.PAY1 AND
  B.PAY1 = C.DEL1 AND
  a.db_name = b.db_name AND
  b.db_name  = c.db_name;

DB_NAME     STRING
-------     ------------------------------------------
DB1     FIRST ORDER:FIRST PAYMENT:FIRST DELIVER
DB2     SECOND ORDER:SECOND PAYMENT:SECOND DELIVER
DB1     THIRD ORDER:THIRD PAYMENT:THIRD DELIVER

I hope this helps.

Kind regards.

What is the problem with this PL/SQL block
declare
v_count integer: = 0;
Start
-immediate ' select count (1) in v_count of | "abc". '.table1 ';
run immediately ' select count (1) in abc.table1 v_count;
dbms_output.put_line ('v_count: ' | v_count);
end;

When I execute the pl/sql block above, I get the following error:
ORA-00905: lack of keyword
ORA-06512: at line 6

What I am doing wrong?
When I use SELECT COUNT (1) INTO v_count FROM abc.table1; (instead of the dynamic sql), it works.
I know I can't use run immediately to SELECT, but I need to make the dynamic SQL because table1 will be developed according to several drawings.

Would appreciate an explanation of the error above, or alternate solution (s) SQL dynamic.

Thank you
```
DECLARE
  v_count INTEGER := 0;
BEGIN
  -- execute immediate 'select count(1) into v_count from ' || 'abc' || '.table1';
  EXECUTE IMMEDIATE 'select count(1)  from abc.table1' into v_count;
  dbms_output.put_line('v_count: ' || v_count);
END;
```
TEST
```
DECLARE
  v_count INTEGER := 0;
BEGIN
  -- execute immediate 'select count(1) into v_count from ' || 'abc' || '.table1';
  EXECUTE IMMEDIATE 'select count(1) from dual ' into v_count;
  dbms_output.put_line('v_count: ' || v_count);
END;
/
v_count: 1

PL/SQL procedure successfully completed.
```
HTH
SS

Select the query within the PL/SQL block.

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