Set « Data Types « MySQL Tutorial

10.19.1.SET Type
10.19.2.SET column type
10.19.3.Using the SET type
10.19.4.If you set a SET column to an unsupported value, the value is ignored and a warning is issued
10.19.5.Search for SET values using the FIND_IN_SET() function
10.19.6.Search for SET values using the LIKE operator
10.19.7.Looking for values containing the first set member
10.19.8.MySQL stores SET and ENUM as numbers
10.19.9.Looking for an exact match in a set column