MySQL建表語句+添加註釋

1.建表+註釋

CREATE TABLE student(
  id INT PRIMARY KEY AUTO_INCREMENT COMMENT '學號',
  name VARCHAR(200) COMMENT '姓名',
  age    int COMMENT '年齡'
) COMMENT='學生信息'

2.修改註釋

修改表註釋-ALTER TABLE student COMMENT '學生表';
                    
修改列註釋-ALTER TABLE student MODIFY COLUMN name VARCHAR(100) COMMENT '姓名';

SELECT table_name,table_comment FROM information_schema.tables  WHERE table_schema = '所在的db' AND table_name ='表名groups'
SHOW FULL COLUMNS FROM groups
-- 這個能夠按條件的去搜索某名字或某數據類型的列的信息：例如
SHOW FULL COLUMNS FROM tableName WHERE FIELD = 'add_time' OR TYPE LIKE '%date%' -- 查看tableName表中列名是add_time的或類型是date的列
SELECT  column_name, column_comment FROM information_schema.columns WHERE table_schema ='db'  AND table_name = 'groups'
SHOW  CREATE TABLE communication_group