Mysql Table View or comment fields Comment
View all comments table
The SELECT
table_name table,
table_comment table shows
the FROM
information_schema.tables
the WHERE
TABLE_SCHEMA = 'database name'
the ORDER BY
table_name
Notes query all tables and fields
The SELECT
a.table_name table,
a.table_comment table shows,
b.COLUMN_NAME field names,
b.column_comment field descriptions,
b.column_type field type,
b.column_key constraint
the FROM
INFORMATION_SCHEMA. TABLES A
the LEFT INFORMATION_SCHEMA the JOIN. A.table_name the COLUMNS the ON B b.TABLE_NAME =
the WHERE
a.table_schema = 'database name'
the ORDER BY
a.table_name
Notes query all the fields in a table
SELECT
COLUMN_NAME field names,
column_comment field descriptions,
column_type field type,
column_key from information_schema.columns constraint from
WHERE TABLE_SCHEMA = 'database name'
and table_name = 'table';
or
show full columns from 表名;
View table generated DDL
Note that the table name without single quotation marks
show create table 表名;
New tables and add tables and fields Comment
Table T_USER Create (
ID the INT (. 19) Primary Key AUTO_INCREMENT Comment 'master key',
NAME VARCHAR (300) Comment 'name',
CREATE_TIME DATE Comment 'Created'
) Comment = 'user information table';
Note modifying a table / field
Modify Table Notes
alter table t_user comment = 'table annotation information (user information table) modified';
Modify the comment field
alter table t_user modify column id int comment ‘主键ID’;