A Gentle Introduction to

SQL

NEW.

These questions have been submitted by users.



After constraints have been created, can SQL change them?
Say you created a table with a column limited to 50 characters of input. After said table has been used you want to expand the column to allow 100 characters of input. Is there a way to change the constraints on a column with SQL (without creating a new table)?
db2 variations:
None

access
db2
mysql
oracle
postgres
sqlserver