To overcome this limitation, MySQL added the <=> operator to allow you to test for equality with both NULL and non-NULL values. MySQL Forums Forum List » InnoDB. The CREATE INDEX statement is used to create indexes in tables. The SQL BETWEEN Operator. To better explain the difference between the = operator and the <=> operator, we will include some examples with both queries and data. They are similar to textbook indexes. Summary: in this tutorial, you will learn how to query index information from a table by using the MySQL SHOW INDEXES command.. Introduction to MySQL SHOW INDEXES command. The values can be numbers, text, or dates. The BETWEEN operator is a logical operator that allows you to specify whether a value in a range or not.

Advanced Search. The BETWEEN operator is inclusive: begin and end values are included. New Topic. A table in MySQL can have several indexes, but when I check the 'fragmentation ratio' with that famous formula, I don't see the fragmentation of each index, but the table as a whole.

The BETWEEN operator is often used in the WHERE clause of the SELECT, UPDATE, and DELETE statements. SQL CREATE INDEX Statement. Summary: in this tutorial, you will learn how to use MySQL BETWEEN operator to determine whether a value is in a range of values.. Introduction to MySQL BETWEEN Operator. Indexes are used to speed-up query process in SQL Server, resulting in high performance. Indexes are used to retrieve data from the database more quickly than otherwise. The users cannot see the indexes, they are just used to speed up searches/queries. SHOW INDEXES FROM table_name; . The BETWEEN operator selects values within a given range. To query the index information of a table, you use the SHOW INDEXES statement as follows:. In textbooks, if you need to go to a particular chapter, you go to the index, find the page number of the chapter and go directly to that page. To get the index of a table, you specify the table name after the FROM keyword. When I want to optimize the indexes in MySQL, I don't choose a particular index to operate on (as in SQL Server).