Error adding unique constraint: Column in table is of a type that is invalid for use as a key column in an index
122246
SQL Server 2005 How Create a Unique Constraint?
33176
Can I have multiple primary keys in a single table?
41165
Foreign key constraints failures
12087
How to drop unique in MySQL?
77462
PGError: ERROR: column "p.name" must appear in the GROUP BY clause or be used in an aggregate function
57315
Trying to add a column of Mysql timestamp through hook_update
139969
How to represent it with UNIQUE indexes and foreign keys?
47834
What is wrong with this statement? 'Unknown column'?
68082
How do I ALTER a PostgreSQL table and make a column unique?
25897
Custom unique constraint, only enforced if one column has a specific value
36338
IllegalArgumentException: Invalid column
127456
How to configure programmatically a unique constraint on several fields of a custom entity?
20657
Postgres : Relation does not exist error
125272
ON creating BITMAP INDEX on a table in mysql throws error
16236
Is it possible to enforce unique values in a column, excluding nulls?
36267
insert query with varchar as data type for primary key
99717
Foreign key constraint on array member?