MySQL: Create unique value constraint between two columns in the *same* row
103208
How to prevent creation of records where the value of two fields is the same?
12087
How to drop unique in MySQL?
88990
Swapping column values in MySQL
31835
mysql trigger operand should contain 2 columns
135259
How do you copy a record in a SQL table but swap out the unique id of the new row?
113138
How to expand comma-separated field into multiple rows in MySQL
145311
Generate an increment ID that is unique for a given value of a foreign key
139969
How to represent it with UNIQUE indexes and foreign keys?
119372
Mysql: Select all data between two dates
9566
Can we limit the number of rows in a table in MySQL?
144338
Can I add a unique constraint that ignores existing violations?
61152
constraint in oracle
63727
How can I write SQL for a table that shares the same name as a protected keyword in MySql?
34609
How can I define a composite primary key in SQL?
112282
Remove duplicate fields in a given column (after ID check)
120742
MySQL variable format for a "NOT IN" list of values
113750
When should I use a unique constraint instead of a unique index?