Adding Constraints to an existing table

Question

Hi,
I've consulted the forum, documentation, the internet and text books but cannot find the correct SQL command to add constraints to an existing table
Obviously I would
ALTER TABLE Turkey ADD CONSTRAINT Whitemeat
But what comes next is puzzling, the values of column Whitemeat can be any value other than Dinner, Gravy, Pumpkin, or Sauce
Any assistance would be great
Thank You

Answer 1

Hi,
user8998591 wrote:
Sorry,
This is what I'm trying to run
ALTER TABLE TURKEY add
CONSTRAINT TURKEY_WHITEMEAT_CK CHECK WHITEMEAT NOT IN ('Dinner', 'Gravy', 'Pumpkin', 'Sauce');And this is the error message I am getting
Error report:
SQL Error: ORA-00906: missing left parenthesis
00906. 00000 -  "missing left parenthesis"
*Cause:   
*Action:Thank you for your assistanceSee the [SQL Language manual|http://download.oracle.com/docs/cd/B28359_01/server.111/b28286/statements_3001.htm#sthref5176] for the correct syntax.
The condition after the keyword CHECK has to be in parentheses.
To add a CHECK constraint to an existing table, I think you have to modify the column.
ALTER TABLE turkey
MODIFY  ( whitemeat     CONSTRAINT     turkey_whitemeat_ck
                 CHECK          ( whitemeat NOT IN ( 'Dinner'
                                            , 'Gravy'
                                      , 'Pumpkin'
                                      , 'Sauce'
     )                    )             );Edited by: Frank Kulash on Jan 22, 2010 4:37 PM