Analyzing MySQL database and data table exists

Analyzing MySQL database and data table exists

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How to use SQL queries, database and data tables to determine whether there is?

 

1, it is determined whether there is a database

SQL query as follows:

the SELECT  *  
from information_schema.SCHEMATA 
 the WHERE SCHEMA_NAME =  ' need to find the database name ' ;

 

 Can be fuzzy query, SQL as follows:

the SELECT  *  
from information_schema.SCHEMATA 
 the WHERE SCHEMA_NAME like  ' part of the name% name of the database to be queried% ' ;

 

2, it is determined whether there is a data table

SQL query as follows:

SELECT  *  
from information_schema.tables 
 WHERE TABLE_NAME =  ' need to query the data table ' ;

 

Can be fuzzy query, SQL as follows:

the SELECT  *  
from information_schema.tables 
 the WHERE TABLE_NAME like  ' % part of the name need to query the database name% ' ;