using check constraints

Similar Questions

• Create the table using check constraints

  I am trying to create a table with the following sql statement.
  
  CREATE TABLE suppliers
  (
  supplier_id NULL NUMERIC (4).
  supplier_name NULL VARCHAR2 (50).
  Date1 DATE NULL,.
  date2 DATE NULL CONSTRAINT CHECK check_date (date1 > date2)
  );
  
  
  I am gettign the following error
  
  "ORA-02438: column check constraint cannot reference other columns.
  
  How can I get this red using a trigger.
  Help, please

  Simply, you missed a comma after your last column and constraint.

  ME_XE?CREATE TABLE suppliers
    2  (
    3  supplier_id NUMERIC(4) NULL ,
    4  supplier_name VARCHAR2(50) NULL ,
    5  date1 DATE NULL ,
    6  date2 DATE NULL ,
    7  CONSTRAINT check_date CHECK (date1 > date2)
    8  );
  
  Table created.
  
  Elapsed: 00:00:00.04
  

• Customized using regexp check constraint

  Oracle 11.2.0.1

  I need a customized using regexp expressions check constraint.  We have a single column in our table REGNO, which is used to keep the registration number of our customers.  It has alpha and numeric values, the first is Alpha and rest is digital with preceding zeros as A0100 A1245, C1111 etc.  Sometimes, in the application user enters regnos evil if we want to stop entering the bad regnos i.e. assume that the user name is Ashok Kumar and in the series, we have 1000 users so this new user should have A1001 (other than any value A1001, in this example, the constraint must be limit to enter the value) only, not the others nor a1001 , A1000, nor A1002 or < has no > 1001 too. Rather than having 26 sequences (A to Z), we get a table where we have these columns:

  Alpha char (1), number of LastNo.  But sometimes a user enters wrong number value and stores it in the table, so next time for the same gap alpha arrives and confusing.

  So, we must have a constraint of database level so that ONLY the correct values must be entered.

  Kindly help me how I have this task please.

  Thank you.

  If REGNO is a derived value then why let you the user enter a value. Just generate the user.

• Extract metadata check constraint using the JDBC driver

  Hello
  
  How to extract metadata check constraint using the JDBC driver?
  
  I know that by using the package dbms_metadata is possible, but the results of the get_ddl function are limited by the permissions of the user account, log on to oracle customer. So, how others pure Java implemented customer oracle can get the metadata of check constraints by using the same user account used to run the dbms_metadata.get_ddl function when this function cannot obtain metadata restrictions for approval when throwing an exception saying that the cheque does not exist?
  
  For example, in Aqua Data Studio and further implemented in pure Java metadata check constraints are extracted and showed in the Table Properties, but when I use the same user account in a java program using JDBC to execute dbms_metadata.get_ddl, an exception is throwed with a message that the constraint does not exist.
  
  So I guess that these pure-Java Oracle customers use Oracle JDBC driver to extract the metadata of check constraint (ddl or the status of the audit). If anyone knows how to use the Oracle JDBC driver to do this, please help me!

  SELECT *
  FROM all_constraints
  WHERE constraint_type = 'C';
  

  will give you all the validation constraints

• How to use current date in the check constraint

  Hello
  You could help me with this?

  create table 
  test_1 (
  xxx number (1),
  yyy number(1), 
  zzz number(1), 
  sss date check (sss < .......));

  Thanks in advance for your help

  Chanchal Wankhade wrote:
  Hello

  SQL> create table table_name (id number, tdate date check (jdate < sysdate));
  create table table_name (id number, tdate date check (jdate < sysdate))
  *
  ERROR at line 1:
  ORA-02438: Column check constraint cannot reference other columns
  

  There are some workaround solutions...

  And to add, that your mistake here is different - you're talking about another column JDATE (typo..?) in the check constraint... The actual column name is ADATE... :)

  Published by: JAC on December 5, 2012 19:15

• Issue by creating the Check constraint

  Hi Experts,

  I have obligation to create a check on a column constraint (Number (6.2)) is where in the max value must be less than 4000.

  But the column already has the data of more than 4000. Also, I can't delete the data that is already present in the table.

  I'm just using an alter command

  SQL > alter table test add check constraint CC_A (an < 4000);

  Error is:

  SQL error: ORA-02293: cannot validate (CC_A) - violated check constraint

  02293 00000 - "can't validate (s.%s) - violated check constraint.

  * Cause: an alter table operation tried to validate a check constraint to

  populated table that has nocomplying values.

  Can you suggest me work around him?

  Kind regards

  RV

  Hello

  RV says:

  Hi Experts,

  I have obligation to create a check on a column constraint (Number (6.2)) is where in the max value must be less than 4000.

  But the column already has the data of more than 4000. Also, I can't delete the data that is already present in the table.

  I'm just using an alter command

  SQL > alter table test add constraint CC_A (one check<>

  Error is:

  SQL error: ORA-02293: cannot validate (CC_A) - violated check constraint

  02293 00000 - "can't validate (s.%s) - violated check constraint.

  * Cause: an alter table operation tried to validate a check constraint to

  populated table that has nocomplying values.

  Can you suggest me work around him?

  Kind regards

  RV

  You can specify NOVALIDATE ACTIVATE when you create the constraint.

  ALTER TABLE test

  ADD CONSTRAINT cc_a CHECK (one<>

  ENABLE NOVALIDATE

  ;

  The constraint does not apply to the values already in the table, but if you update a column where the condition is violated, the constraint applies to the new value.

• CHECK constraint

  Hello experts,

  I am new to oracle using sql developer in windows 7.i have a problem in which I must first make two tables:

  Tbl_State (S_Id, S_Name, Country_Id)

  and

  tbl_City (C_Id, C_Name, State_Id)

  .

  I have to add a constraint to the tbl_city table so that it can accept only State_Id column values that are exist in the S_Id column in tbl_state. In that I tried to add a sub to mach check constraint query the values of tbl_state. S_Id but I think that Oracle sql does not query sub in the check constraint. Give me a suggestion how to fix this problem.

  Thnak you

  regrads

  Aditya

  Hello, Solomon,

  I forgot to ask the OP to do first the column Tbl_state in the table as the primary key.

• Several multiple conditions can be given in the check constraint

  Hello
  
  I am agent table where the city and the commission is there. When inserting records, I need to apply a rule that if the city is London commission cannot be less than 300. Can it be done using validation constraints? I was able to do so using PL/SQL. I just want to know if it could be done using validation constraints. If so, then need please the syntax.

  Try like this

  create table test1
  (varchar2 (100) of the city)
  Commission number,
  check test_name forced ((ville = 'London' et commission > = 300) or city! = 'London'));

• Get a NAMED check constraint when the entity attribute derived from the field

  I'm designing a new database and beginning with a logic model of the ER. I've defined several areas, such as the NO_YES field (with values of ' no and 'Y'). When I use this area as a data type of an attribute of the entity (for example, the CHANGE_REQUEST.IS_APPROVED attribute), I also specify a constraint name (for example, CR_APPROVED_CK) of the attribute (this is done in the Group of constraint, property name constraint and the properties of the attribute dialog box, default value).
  
  When I have the logic model to a relational model of the engineer, the constraint name is lost. Specifically, for the definition of the table that is created, for the column in question, in the default column properties and constraints Panel dialog box, the name of constraint property is empty. When I generated the DDL of the relational model, the check constraint that is generated is an inline check constraint (such as ' IS_APPROVED VARCHAR2 (1) CHECK (IS_APPROVED IN ('n', 'Y')) '). When this DDL is executed to generate database objects, the created check constraint has a system-generated name. I want the constraint to have a name that I create.
  
  By experimentation, I found that in the relational model, if I specify a value for the property name of the constraint in the DOF resulting constraint get named (an ALTER TABLE statement is generated that contains "ADD CONSTRAINT CR_APPROVED_CK CHECK (IS_APPROVED IN ('n', 'Y'))"). However, I have redundantly change the relational model in the same way that I edited the logic model to specify the constraint names.
  
  Is there a way to guarantee that the constraint names defined in a logic model transferred during the engineering of a logic model to a physical model.
  
  The version of the Data Modeler I use is 3.0.0.665.

  Is there a way to guarantee that the constraint names defined in a logic model transferred during the engineering of a logic model to a physical model.

  There is ' compare/copy options' tab in the technical dialogue - clear the checkbox "do not apply to new objects.

  Philippe

• CHECK constraint question

  Oracle 11 R2
  
  My question is if I can create a check constraint using a SELECT statement on a different table?
  
  So instead of
  
  CHECK (building ('01', ' 02', ' 03'));
  
  I can do something like this:
  
  CHECK (select distinct from the other table);
  
  Example of welcome.

  user10480146 wrote:
  I'm just checking if the building is in the other table. Is a foreign key must use the same columns as the primary key? Or I can use a foreign key with ALL the columns from the other table?

  A unique key will do.

• Table check constraint

  Hello
  
  I am currently using a database of 11.2 and I can't try to simplify a check constraint. I've been using decodes, but obtaining them ugly and not very readable.
  CASE
  WHEN resource_type_key = "U".
  AND interface_name IS NOT NULL
  Resource_name IS NULL AND
  AND resource_full_path_name IS NULL THEN 'valid '.
  WHEN resource_type_key <>'U '.
  AND interface_name IS NULL
  AND resource_name IS NOT NULL
  AND resource_full_path_name IS NOT NULL THEN 'valid '.
  ELSE 'Invalid '.
  END
  
  Any suggestions?

  You must provide an expression that evaluates to true if valid, FALSE otherwise.

  I suggest somehting more like:

  CHECK((
  resource_type_key = 'U'
  AND interface_name IS NOT NULL
  AND resource_name IS NULL
  AND resource_full_path_name IS NULL)
  OR (resource_type_key !='U'
  AND interface_name IS NULL
  AND resource_name IS NOT NULL
  AND resource_full_path_name IS NOT NULL))
  

• BAD RESULTS WITH OUTER JOINS AND TABLES WITH A CHECK CONSTRAINT

  HII All,
  Could any such a me when we encounter this bug? Please help me with a simple example so that I can search for them in my PB.
  
  
  Bug:-8447623
  
  Bug / / Desc: BAD RESULTS WITH OUTER JOINS AND TABLES WITH a CHECK CONSTRAINT
  
  
  I ran the outer joins with check queries constraint 11G 11.1.0.7.0 and 10 g 2, but the result is the same. Need to know the scenario where I will face this bug of your experts and people who have already experienced this bug.
  
  
  Version: -.
  

  SQL> select * from v$version;
  
  BANNER
  --------------------------------------------------------------------------------
  Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
  PL/SQL Release 11.1.0.7.0 - Production
  CORE    11.1.0.7.0      Production
  TNS for Solaris: Version 11.1.0.7.0 - Production
  NLSRTL Version 11.1.0.7.0 - Production

  Why do you not use the description of the bug test case in Metalink (we obviously can't post it here because it would violate the copyright of Metalink)? Your test case is not a candidate for the elimination of the join, so he did not have the bug.

  Have you really read the description of the bug in Metalink rather than just looking at the title of the bug? The bug itself is quite clear that a query plan that involves the elimination of the join is a necessary condition. The title of bug nothing will never tell the whole story.

  If you try to work through a few tens of thousands of bugs in 11.1.0.7, of which many are not published, trying to determine whether your application would be affected by the bug? Wouldn't be order of magnitude easier to upgrade the application to 11.1.0.7 in a test environment and test the application to see what, if anything, breaks? Understand that the vast majority of the problems that people experience during an upgrade are not the result of bugs - they are the result of changes in behaviour documented as changes in query plans. And among those who encounter bugs, a relatively large fraction of the new variety. Even if you have completed the Herculean task of verifying each bug on your code base, which would not significantly easier upgrade. In addition, at the time wherever you actually performed this analysis, Oracle reportedly released 3 or 4 new versions.

  And at this stage would be unwise to consider an upgrade to 11.2?

  Justin

• modify the check constraint

  Hello friends...
  I want to edit the check constraint... It is possible to modify the check constraint?
  
  
  ALTER TABLE table_name
  change (CONSTRAINT constr_name CHECK (yes_no_col_name IN ('n', 'Y')))
  
  It gives me
  
  name of the constraint that is already in use
  
  
  Thank you...

  You can't modify a check constraint. You can only change its State.

  Check the document.

  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14200/statements_3001.htm#i2103997

• Distinguish NOT NULL constraints Check constraints

  Join user_constraints to user_cons_columns for constraint_type = 'C' indicates the Check constraints, and NOT NULL constraints, but also (because those are implemented as Check constraints).
  
  My question is how to filter constraints NOT NULL to let only the 'normal Check constraints '?
  
  I tried WHERE SUBSTR(search_condition,-12,12) & LT; & GT; 'IS NOT NULL '.
  but as search_condition is of type LONG, I can't use substring.
  
  Has anyone already found it? Thank you!!

  ByronBarton wrote:

  Has anyone already found it?

  Well, there is no easy way. Simple, if you always create named* validation constraints. If so, online NOT NULL constraint will get name generated and forced check no:

  SQL> create table test_tbl(
    2                        c1 number not null,
    3                        c2 number,
    4                        constraint test_tbl_chk1
    5                          check(
    6                                c2 is not null
    7                               )
    8                       )
    9  /
  
  Table created.
  
  SQL> select  constraint_name,
    2          generated
    3    from  user_constraints
    4    where table_name = 'TEST_TBL'
    5  /
  
  CONSTRAINT_NAME                GENERATED
  ------------------------------ --------------
  SYS_C008666                    GENERATED NAME
  TEST_TBL_CHK1                  USER NAME
  
  SQL> 
  

  However, if the check constraint is not named we:

  SQL> create table test_tbl(
    2                        c1 number not null,
    3                        c2 number,
    4                        check(
    5                              c2 is not null
    6                             )
    7                       )
    8  /
  
  Table created.
  
  SQL> select  constraint_name,
    2          generated
    3    from  user_constraints
    4    where table_name = 'TEST_TBL'
    5  /
  
  CONSTRAINT_NAME                GENERATED
  ------------------------------ --------------
  SYS_C008668                    GENERATED NAME
  SYS_C008669                    GENERATED NAME
  
  SQL> 
  

  Then, the only way I know is:

  SQL> column owner format a10
  SQL> column table_name format a10
  SQL> column column_name format a10
  SQL> select  u.name owner,
    2          t.name table_name,
    3          a.name column_name,
    4          c.name constraint_name,
    5          decode(k.type#,7,'NOT NULL',1,'CHECK CONSTRAINT','UNKNOWN') type
    6    from  sys.USER$ u,
    7          sys.CON$  c,
    8          sys.CDEF$ k,
    9          sys.OBJ$ t,
   10          sys.COL$ a,
   11          sys.CCOL$ r
   12    where u.name   = user
   13      and c.owner# = u.user#
   14      and k.con#   = c.con#
   15      and t.obj#   = k.obj#
   16      and t.name   = 'TEST_TBL'
   17      and a.obj#   = t.obj#
   18      and r.col#   = a.col#
   19      and r.con#   = k.con#
   20      and r.obj# = k.obj#
   21  /
  
  OWNER      TABLE_NAME COLUMN_NAM CONSTRAINT_NAME                TYPE
  ---------- ---------- ---------- ------------------------------ ----------------
  SCOTT      TEST_TBL   C1         SYS_C008668                    NOT NULL
  SCOTT      TEST_TBL   C2         SYS_C008669                    CHECK CONSTRAINT
  
  SQL> 
  

  SY.

• If I use check my spelling as I type, is this just local?

  If I use "check my spelling as I type", which is only local, or this connection - is online somewhere and transmitting what I type to see if it is correctly spelled? Just double check...

  The checker spelling of Firefox still works on the spot.
  Some site may be using an advanced editor that comes with its own spelling checker and disable the checker spelling of Firefox.

  You need to have a dictionary installed and have a tick to 'Check spelling' to use the built-in spellchecker of Firefox.

  • https://support.Mozilla.org/KB/using+the+spell+checker
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