COUNT MASK RULE
Description
The COUNT MASK RULE syntax is used to query the number of mask rules for specified database.
Syntax
CountMaskRule::=
'COUNT' 'MASK' 'RULE' ('FROM' databaseName)?
databaseName ::=
identifierSupplement
- When
databaseNameis not specified, the default is the currently usedDATABASE. IfDATABASEis not used,No database selectedwill be prompted.
Return value description
| Column | Description |
|---|---|
| rule_name | rule type |
| database | the database to which the rule belongs |
| count | the number of the rule |
Example
- Query the number of mask rules for specified database.
COUNT MASK RULE FROM mask_db;mysql> COUNT MASK RULE FROM mask_db;
+-----------+----------+-------+
| rule_name | database | count |
+-----------+----------+-------+
| mask | mask_db | 3 |
+-----------+----------+-------+
1 row in set (0.50 sec)- Query the number of mask rules for current database.
COUNT MASK RULE;mysql> COUNT MASK RULE;
+-----------+----------+-------+
| rule_name | database | count |
+-----------+----------+-------+
| mask | mask_db | 3 |
+-----------+----------+-------+
1 row in set (0.50 sec)Reserved word
COUNT, MASK, RULE, FROM