MySql查看索引、查看表空间、查看所有表的sql语句

/*1.查看索引

（1）单位是GB*/

SELECT CONCAT(ROUND(SUM(index_length)/(102410241024), 6), ' GB') AS 'Total Index Size'
FROM information_schema.TABLES WHERE table_schema LIKE '${database}';
/*
+------------------+
| Total Index Size |
+------------------+

*/
/*
（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)/(102410241024), 6), ' GB') AS 'Total Data Size'
FROM information_schema.TABLES WHERE table_schema LIKE '${database}';
/*
+-----------------+
| Total Data Size |
+-----------------+

*/
/*
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}';