要获取MySQL数据库中表的大小，可以使用“information_schema.tables”。
这是获取所有表大小的语法。
SELECT TABLE_NAME AS `ALLTABLESNAME`, ROUND((DATA_LENGTH + INDEX_LENGTH) / 1024 / 1024) AS `TABLESIZEIN(MB)`
FROM information_schema.TABLES WHERE TABLE_SCHEMA = "yourDatabaseName"
ORDER BY (DATA_LENGTH + INDEX_LENGTH) ASC;
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让我们应用上述语法来获取表的大小。
mysql> SELECT TABLE_NAME AS `ALLTABLESNAME`, ROUND((DATA_LENGTH + INDEX_LENGTH) / 1024 / 1024) AS `TABLESIZEIN(MB)`
-> FROM information_schema.TABLES WHERE TABLE_SCHEMA = "business"
-> ORDER BY (DATA_LENGTH + INDEX_LENGTH) ASC;
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示例输出。
+------------------------------------------------------------------+-----------------+
| ALLTABLESNAME | TABLESIZEIN(MB) |
+------------------------------------------------------------------+-----------------+
| studentrecordwithmyisam | 0 |
| querydatedemo | 1 |
| rownumberdemo | 0 |
| secondtable | 0 |
| spacecolumn | 2 |
| table1 | 0 |
| tbldemotrail | 2 |
| tblstudent | 0 |
| timestamptodatedemo | 1 |
| uniqueconstraintdemo | 0 |
| usernameandpassworddemo | 2 |
| addingunique | 5 |
| bookindexes | 0 |
| tblf | 0 |
| uniquedemo | 2 |
| multipleindexdemo | 0 |
| uniquedemo1 | 0 |
| foreigntable | 5 |
| tabledemo2 | 0 |
| foreigntabledemo | 2 |
| studentenrollment | 0 |
| tabledemo3 | 0 |
| duplicatebookindexes | 0 |
| clonestudent | 2 |
| student | 0 |
+------------------------------------------------------------------+-----------------+
26 rows in set (10.29 sec)
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