Share an example tutorial on sql statement performance tuning

This article mainly introduces the relevant information of simple examples ofmysqlsql statement performance tuning. Friends in need can refer to

mysql sql Simple example of statement performance tuning

When doing server development, sometimes there are certain requirements for concurrency. Sometimes what affects the speed is a certain SQL statement, such as a certainstored procedure. Now suppose that during the execution of the server code, a certain SQL is executed slowly. How to optimize it?

If the server code now executes the following sql stored procedure very slowly:

call sp_wplogin_register(1, 1, 1, '830000', '222222');

You can proceed as followsDebugging:

1. Open mysql profiling:

2. Then execute the SQL that needs to be tuned, we execute it here Two sql, one commit statement, and the other is to call the above stored procedure statement:

3. Use profiling to display each statement The execution time of SQL, in which the stored procedure consists of a series of SQL, is also broken down and displayed here:

You can see the red marked The execution speed of SQL is far from the same level as other SQL statements. We optimize this line, such as establishing anindexfor the field f_phone.

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