SQLite:“ALTER TABLE `game` ADD UNIQUE(`name`)” Error in SQLite

Question

I used the same command syntax above as in Mysql and would like set a unique key for the tables\'s filed on Android Device environment, however, the error prompted in LogCa

Answer 1

sqlite support alter in another way. You can try the following: create unique index unique_name on game(name); If you want to create a constraint for two or more columns at one time: create unique index unique_name on game(name1,name2,mame3);