本文我们介绍MySQL数据库表空间和索引的查看方法，并详细地给出了其代码，接下来我们一一介绍。
1.查看索引
（1）单位是GB
SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024*1024), 2), \' GB\')
AS \'Total Index Size\'
+------------------+
| Total Index Size |
+------------------+
| 1.70 GB |
+------------------+
（2）单位是MB
SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024), 2), \' 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), 2), \' 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\',
CONCAT(ROUND(table_rows/1000000,2),\'M\') AS \'Number of Rows\',
CONCAT(ROUND(data_length/(1024*1024*1024),2),\'G\') AS \'Data Size\',
CONCAT(ROUND(index_length/(1024*1024*1024),2),\'G\') AS \'Index Size\' ,
CONCAT(ROUND((data_length+index_length)/(1024*1024*1024),2),\'G\')
AS\'Total\'FROM information_schema.TABLES
WHERE table_schema LIKE \'database\';