How to use MySQL Explain Statement

1. What is explain statement in MySQL?
2. How Use explain MySQL?
3. How do you read explain analyze MySQL?
4. Where can I find explain plan in MySQL?
5. What are queries explain with the help of an example?
6. How do I see MySQL performance queries?

What is explain statement in MySQL?

The EXPLAIN statement provides information about how MySQL executes statements: EXPLAIN works with SELECT , DELETE , INSERT , REPLACE , and UPDATE statements. ... When EXPLAIN is used with an explainable statement, MySQL displays information from the optimizer about the statement execution plan.

How Use explain MySQL?

The EXPLAIN command provides information about how MySQL executes queries. EXPLAIN can work with SELECT, DELETE, INSERT, REPLACE, and UPDATE statements. We'll first analyze the original query, then attempt to optimize the query and look into the optimized query's execution plan to see what changed and why.

How do you read explain analyze MySQL?

To examine the query plan: EXPLAIN FORMAT=TREE. To profile the query execution: EXPLAIN ANALYZE.
...
There are several new measurements here:

1. Actual time to get first row (in milliseconds)
2. Actual time to get all rows (in milliseconds)
3. Actual number of rows read.
4. Actual number of loops.

Where can I find explain plan in MySQL?

To view a visual explain execution plan, execute your query from the SQL editor and then select Execution Plan within the query results tab. The execution plan defaults to Visual Explain , but it also includes a Tabular Explain view that is similar to what you see when executing EXPLAIN in the MySQL client.

What are queries explain with the help of an example?

Query by Example (QBE) is a database query language for relational databases. It was devised by Moshé M. Zloof at IBM Research during the mid-1970s, in parallel to the development of SQL. It is the first graphical query language, using visual tables where the user would enter commands, example elements and conditions.

How do I see MySQL performance queries?

or using <select your MySQL cluster> → Query Monitor → Running Queries (which will discuss later) to view the active processes, just like how a SHOW PROCESSLIST works but with better control of the queries.