MySQL - Create an Index for a Given Table in MySQL

Create an Index for a Given Table in MySQL

Q

How To Create an Index for a Given Table in MySQL?

✍: FYIcenter.com

A

If you have a table with a lots of rows, and you know that one of the columns will be used often as a search criteria, you can add an index for that column to improve the search performance. To add an index, you can use the "CREATE INDEX" statement as shown in the following script:

mysql> CREATE TABLE tip (id INTEGER PRIMARY KEY,
   subject VARCHAR(80) NOT NULL,
   description VARCHAR(256) NOT NULL,
   create_date DATE NULL);
Query OK, 0 rows affected (0.08 sec)

mysql> CREATE INDEX tip_subject ON tip(subject);
Query OK, 0 rows affected (0.19 sec)
Records: 0  Duplicates: 0  Warnings: 0

⇒CREATE, ALTER and DROP Statements in MySQL

⇒⇒MySQL Database Tutorials

2018-02-14, 622👍, 0💬

Drop an Existing Index in MySQL
How To Drop an Existing Index in MySQL? If you don't need an existing index any more, you should delete it with the "DROP INDEX indexName ON tableName" statement. Here is an example SQL script: mysql> DROP INDEX tip_subject ON tip; Query OK, 0 rows affected (0.13 sec) Records: 0 Duplicates: 0... 2018-02-14, 669👍, 0💬

Create an Index for a Given Table in MySQL
How To Create an Index for a Given Table in MySQL? If you have a table with a lots of rows, and you know that one of the columns will be used often as a search criteria, you can add an index for that column to improve the search performance. To add an index, you can use the "CREATE INDEX" statement ... 2018-02-14, 623👍, 0💬

Drop an Existing Table in MySQL
How To Drop an Existing Table in MySQL? If you want to delete an existing table and its data rows, you can use the "DROP TABLE" statement as shown in the tutorial script below: mysql> SELECT * FROM tipBackup; +----+-------------+---------- ---------------+-------------+| id | subject | descri... 2018-02-14, 621👍, 0💬

Rename an Existing Table in MySQL
How To Rename an Existing Table in MySQL? If you want to rename an existing table, you can use the "ALTER TABLE ... RENAME TO" statement. The tutorial script below shows you a good example: mysql> ALTER TABLE tip RENAME TO faq; Query OK, 0 rows affected (0.01 sec) mysql> SELECT * FROM ... 2018-02-14, 589👍, 0💬

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