PowerDesigner生成sql时,在允许为空的字段后加上nul
方法:
1、点击菜单栏栏Database->Edit Current DBMS
2、在弹出的对话框中依次点击General->Script->Objects->Column
3、在Column上点右键,选择Add Items,在弹出的对话框中选择NullRequired,点击OK
效果:
修改前SQL:
create table USERINF (
USERID varchar(16) not null,
USERNAME varchar(32) ,
PASSWORD varchar(32) ,
constraint PK_USERID primary key (USERID)
);
修改后SQL:
create table USERINF (
USERID varchar(16) not null,
USERNAME varchar(32) null,
PASSWORD varchar(32) null,
constraint PK_USERID primary key (USERID)
);