mysql查看索引、表空间、所有表信息的sql语句

三木尧

${database} 为数据库的名称

/*1.查看索引

（1）单位是GB*/

SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024*1024), 6), ' GB') AS 'Total Index Size'

FROM information_schema.TABLES WHERE table_schema LIKE '${database}';

/*

+------------------+

| Total Index Size |

+------------------+

| 1.70 GB |

+------------------+

*/

/*

（2）单位是MB

*/

SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024), 6), ' MB') AS 'Total Index Size'

FROM information_schema.TABLES WHERE table_schema LIKE '${database}';

/*

   其中“database”为你所要查看的数据库

*/

/*

2.查看表空间

*/

SELECT CONCAT(ROUND(SUM(data_length)/(1024*1024*1024), 6), ' GB') AS 'Total Data Size'

FROM information_schema.TABLES WHERE table_schema LIKE '${database}';

/*

+-----------------+

| Total Data Size |

+-----------------+

| 3.01 GB |

+-----------------+

*/

/*

3.查看数据库中所有表的信息

*/

SELECT CONCAT(table_schema,'.',table_name) AS 'Table Name',

    table_rows AS 'Number of Rows',

    CONCAT(ROUND(data_length/(1024*1024*1024),6),' G') AS 'Data Size',

    CONCAT(ROUND(index_length/(1024*1024*1024),6),' G') AS 'Index Size' ,

    CONCAT(ROUND((data_length+index_length)/(1024*1024*1024),6),' G') AS'Total'

FROM information_schema.TABLES

WHERE table_schema LIKE '${database}';