mysql使用sql語句查詢數據庫所有表注釋等

1、/* 查詢數據庫 test 所有表注釋 */

SELECT TABLE_NAME,TABLE_COMMENT FROM information_schema.TABLES WHERE table_schema='test';

 

2、要查詢表字段的注釋

SELECT COLUMN_NAME,column_comment FROM INFORMATION_SCHEMA.Columns WHERE table_name='class' AND table_schema='test';

 

3、一次性查詢數據庫 "test" 下表注釋以及對應表字段注釋

SELECT t.TABLE_NAME,t.TABLE_COMMENT,c.COLUMN_NAME,c.COLUMN_TYPE,c.COLUMN_COMMENT FROM information_schema.TABLES t,INFORMATION_SCHEMA.Columns c WHERE c.TABLE_NAME=t.TABLE_NAME AND t.`TABLE_SCHEMA`='test';

4、項目中使用的，查詢數據庫所有表的相關字段，屬性

SELECT 
    'xx系統' system_name,
    table_comment table_comment,
    a.table_name,
    column_comment,
    column_name,
    CASE WHEN column_key ='PRI' THEN 'Y' ELSE 'N' END is_key,
    CASE WHEN column_name='id' OR column_name='created_by' THEN '自動' ELSE '手動' END get_type,
    column_type
FROM (SELECT * FROM information_schema.COLUMNS WHERE table_schema ='test')a
    LEFT JOIN (SELECT table_name,table_comment FROM information_schema.TABLES WHERE table_schema='test') b
    ON a.table_name = b.table_name
    ORDER BY table_name,ordinal_position ;