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  • 查询数据库中索引列

    -- 查询数据库中所有列
    select  
        tab.TABLE_SCHEMA 数据库名,
        tab.TABLE_NAME 表名,
        tab.TABLE_COMMENT 表说明,
        col.COLUMN_NAME 字段名,
        col.COLUMN_TYPE 字段类型,
        col.IS_NULLABLE 是否可为空,
        col.COLUMN_DEFAULT 默认值,
        col.COLUMN_COMMENT 字段说明
    FROM information_schema.`COLUMNS` col 
    LEFT JOIN information_schema.`TABLES` tab on (tab.TABLE_SCHEMA = col.TABLE_SCHEMA and tab.TABLE_NAME = col.TABLE_NAME)
    where 1 = 1 
    and col.TABLE_SCHEMA = 'user_db' 
    and col.TABLE_NAME = 'user' 
    order by col.TABLE_SCHEMA,col.TABLE_NAME;

    运行结果

    -- 查询数据库中索引列
    select DISTINCT 
        col.TABLE_SCHEMA 数据库名,
        col.TABLE_NAME 表名,
        col.COLUMN_NAME 字段名,
        IF(sta.INDEX_NAME = 'PRIMARY','YES','') 是否为主键索引,
        IF(sta.INDEX_NAME != 'PRIMARY','YES','') 是否为索引
    FROM information_schema.`COLUMNS` col 
    INNER JOIN information_schema.STATISTICS sta on 
        (sta.TABLE_SCHEMA = col.TABLE_SCHEMA and sta.TABLE_NAME = col.TABLE_NAME and sta.COLUMN_NAME = col.COLUMN_NAME) 
    where 1 = 1 
    and col.TABLE_SCHEMA = 'user_db' 
    and col.TABLE_NAME = 'user' 
    order by col.TABLE_SCHEMA,col.TABLE_NAME

    运行结果

     

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  • 原文地址:https://www.cnblogs.com/mjtabu/p/14381060.html
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