MySQL 如何将表字段的默认值设置为 0.00?
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时间:2020-08-31 21:07:21 来源:igfitidea点击:
How to set Default value of table field to 0.00?
提问by aslamdoctor
I have created a table named "salary_mst" in MySql database. Table fields are
我在 MySql 数据库中创建了一个名为“salary_mst”的表。表字段是
id -> auto increment
name -> varchar(50)
salary -> double
Now if someone don't insert value in salary, it should store default 0.00 How can I do that ?
现在如果有人不在工资中插入值,它应该存储默认值 0.00 我该怎么做?
回答by Emil
ALTER TABLE `table` ADD COLUMN `column` FLOAT(10,2) NOT NULL DEFAULT '0.00'
回答by Bohemian
create table salary_mst (
id int not null primary key auto_increment,
name varchar(50),
salary double not null default 0
);
To test:
去测试:
insert into salary_mst (name) values ('foo');
select * from salary_mst;
+----+------+--------+
| id | name | salary |
+----+------+--------+
| 1 | foo | 0 |
+----+------+--------+