统计MySQL中某个数据库中有多少张表

mysql> SELECT count(*) TABLES, table_schema FROM information_schema.TABLES 
where table_schema = 'db_production' GROUP BY table_schema;
+--------+-------------------+
| TABLES | table_schema      |
+--------+-------------------+
|    169 | db_production | 
+--------+-------------------+

where table_schema = 你的数据库名