How To Drop an Existing Table

Q

How To Drop an Existing Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements

✍: FYIcenter.com

A

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     | description             | create_date |
+----+-------------+-------------------------+-------------+
|  1 | Learn MySQL | Visit dev.fyicenter.com | 2006-07-01  |
+----+-------------+-------------------------+-------------+
1 row in set (0.40 sec)

mysql> DROP TABLE tipBackup;
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT * FROM tipBackup;
ERROR 1146 (42S02): Table 'fyi.tipbackup' doesn't exist

Be careful, when you use the "DROP TABLE" statement. All data rows are gone too.

2007-05-11, 4934👍, 0💬

How To Create a New View
How To Create a New View? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements You can create a new view based on one or more existing tables by using the "CREATE VIEW viewName AS selectStatement" statement as shown in the following script: mysql> CREATE TABLE comment (faqID INTEGER, m... 2007-05-11, 5328👍, 0💬

How To Drop an Existing Index
How To Drop an Existing Index? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements 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, ... 2007-05-11, 5190👍, 0💬

How To Create a Table Index
How To Create a Table Index? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements 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 ind... 2007-05-11, 5139👍, 0💬

How To Drop an Existing View
How To Drop an Existing View? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you have an existing view, and you don't want it anymore, you can delete it by using the "DROP VIEW viewName" statement as shown in the following script: mysql> DROP VIEW faqComment; Query OK, 0 rows ... 2007-05-11, 5080👍, 0💬

How To Get a List of Indexes of an Existing Table
How To Get a List of Indexes of an Existing Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you want to see the index you have just created for an existing table, you can use the "SHOW INDEX FROM tableName" command to get a list of all indexes in a given table. The tutor... 2007-05-11, 5070👍, 0💬

How To Create a New Table by Selecting Rows from Another Table
How To Create a New Table by Selecting Rows from Another Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements Let's say you have a table with many data rows, now you want to create a backup copy of this table of all rows or a subset of them, you can use the "CREATE TABLE ... SEL... 2007-05-11, 5067👍, 0💬

How To Delete an Existing Column in a Table
How To Delete an Existing Column in a Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you have an existing column in a table and you do not need that column any more, you can delete it with "ALTER TABLE ... DROP COLUMN" statement. Here is a tutorial script to delete an e... 2007-05-11, 5031👍, 0💬

How To Drop an Existing Table
How To Drop an Existing Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements 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; +----+-------------+---------- ---... 2007-05-11, 4935👍, 0💬

How To Rename an Existing Column in a Table
How To Rename an Existing Column in a Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements If you have an existing column in a table and you want to change the column name, you can use the "ALTER TABLE ... CHANGE" statement. This statement allows you to change the name of a colu... 2007-05-11, 4928👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.