Question

CREATE TABLE tblUser 
( 

    CREATE UNIQUE INDEX i_ITUsername ON tblUser (ITUsername),
    CREATE UNIQUE INDEX i_email ON tblUser (email),
    CREATE INDEX i_disability ON tblUser (disability),
    CREATE INDEX i_name ON tblUser (name)
) TYPE = MyISAM;

任何人都可以看到为什么我在第一个唯一索引行收到错误？据我所知，没有错误:(

Answer 1

第一个错误是您在一列上有两种数据类型，

mobilePhone long int UNSIGNED not null, -- choose one INT or LONG
housePhone long int UNSIGNED,

第二个是你声明TSQL，这里是mysql，

primary key (ITUsername),
UNIQUE i_ITUsername  (ITUsername),
UNIQUE i_email (email),
KEY i_disability  (disability),
KEY i_name (name)

SQLFiddle Demo

MySQL Unique Index错误？

1 个答案: