MySQL Database learning



MySQL Frequently Asked Questions

MySQL FAQs site provides useful material in shape of "Questions and Answers" to learn about MySQL Database. Both the beginner and experienced database developers can find answers to commonly asked questions with examples. The efforts are made to avail the faq with simple examples that helps to learn MySQL, a powerful and the most popular Open Source Relational Database Management System (RDBMS).

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Popular Questions

How to delete or update records of multiple tables in one go?

To perform a single-table DELETE, you refer only to the columns of one table and thus need not qualify the column names with the table name. For example, to delete all records in a table ...

How to compare data of two tables of two different databases in MySQL?

The UNION operator in MySQL can help you to compare data of two tables of two different databases. The following query unions the queries for matching column names and their values from two tables and keeps jus ...

What are advantages and disadvantages of indexes in MySQL?

Indexing is one of the more useful features of MySQL. MySQL allows several types of indexes like primary key index ...

What is difference between delete and truncate statements of MySQL?

Logically, TRUNCATE statement is equivalent to a DELETE statement that deletes all rows from the table, but there are important differences in some cases.  The following list of TRUNCATE and DELETE state ...

What is query cache in MySQL?

MySQL server from version 4.0.1, has introduced Query Cache. When the Query Cache is enabled, the Query Cache stores the each SELECT query text and its corresponding result. Later on, if an identical query is ...