Select: Allows reading data
Insert: Allows inserting and replacing data
Update: Allows changing data
Delete: Allows deleting data
File: Allows importing data from files and exporting data to files. Not set by default.
Create: Allows creating databases and tables.
Alter: Allows altering the structure of existing tables.
Index: Allows creating and dropping indexes.
Drop: Allows dropping of databases and tables.
Create Temporary Tables: Allows creating temporary tables.
Create View: Allows creating new views. (Only available in MySQL5 or better.)
Show View: Allows performing SHOW CREATE VIEW queries. (Only available in MySQL5 or better.)
Create Routine: Allows creating stored routines. (Only available in MySQL5 or better.)
Alter Routine: Allows altering and dropping of stored routines. (Only available in MySQL5 or better.)
Execute: Allows running of store routines. (Only available in MySQL5 or better.)
Max Queries Per Hour: Limits the number of queries a user may send to the server per hour. '0' means no limit.
Max Connections Per Hour: Limits the number of connections the user may open per hour. '0' means no limit.
Max Updates Per Hour: Limits the number of commands that change any table or database the user may execute per hour. '0' means no limit.