为此,请使用ORDERBYCASE语句。让我们首先创建一个表,其中有ENUM类型的列-
create table DemoTable1461 -> ( -> DeckOfCards ENUM(K,J,A,Q) -> );使用插入命令在表中插入一些记录-
insert into DemoTable1461 values(K); insert into DemoTable1461 values(A); insert into DemoTable1461 values(J); insert into DemoTable1461 values(Q);使用select语句显示表中的所有记录-
select * from DemoTable1461;这将产生以下输出-
+-------------+ | DeckOfCards | +-------------+ | K | | A | | J | | Q | +-------------+ 4 rows in set (0.00 sec)以下是按ENUM类型值排序的查询-
select * from DemoTable1461 -> order by -> case DeckOfCards when A then 100 -> when K then 101 -> when Q then 102 -> else 103 -> end;这将产生以下输出-
+-------------+ | DeckOfCards | +-------------+ | A | | K | | Q | | J | +-------------+ 4 rows in set (0.00 sec)