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Create MySQL query to create a table from an existing table?
You can use CREATE TABLE command to create a table from an existing table. The syntax is as follows:
CREATE TABLE yourNewTableName LIKE yourOldTableName
To understand the above syntax, let us create a table. The query to create a table is as follows:
mysql> create table ShowCreateTableCommand -> ( -> Id int NOT NULL AUTO_INCREMENT, -> FirstName varchar(20), -> LastName varchar(20), -> Age int, -> TotalMarks int, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (1.22 sec)
Here is the query to describe a table using DESC command. The query is as follows:
mysql> desc ShowCreateTableCommand;
The following is the output:
+------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +------------+-------------+------+-----+---------+----------------+ | Id | int(11) | NO | PRI | NULL | auto_increment | | FirstName | varchar(20) | YES | | NULL | | | LastName | varchar(20) | YES | | NULL | | | Age | int(11) | YES | | NULL | | | TotalMarks | int(11) | YES | | NULL | | +------------+-------------+------+-----+---------+----------------+ 5 rows in set (0.11 sec)
Here is the query to check the structure of a table:
mysql> show create table ShowCreateTableCommand\G
The following is the output:
*************************** 1. row *************************** Table: ShowCreateTableCommand Create Table: CREATE TABLE `showcreatetablecommand` ( `Id` int(11) NOT NULL AUTO_INCREMENT, `FirstName` varchar(20) DEFAULT NULL, `LastName` varchar(20) DEFAULT NULL, `Age` int(11) DEFAULT NULL, `TotalMarks` int(11) DEFAULT NULL, PRIMARY KEY (`Id`) ) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci 1 row in set (0.00 sec)
Let us now create a new table from an existing table using CREATE TABLE command. The query is as follows:
mysql> CREATE TABLE StudentInformationDemo LIKE ShowCreateTableCommand; Query OK, 0 rows affected (0.49 sec)
Now check whether the structure of new table is matching with old table structure:
mysql> show create table StudentInformationDemo\G
The following is the output:
*************************** 1. row *************************** Table: StudentInformationDemo Create Table: CREATE TABLE `studentinformationdemo` ( `Id` int(11) NOT NULL AUTO_INCREMENT, `FirstName` varchar(20) DEFAULT NULL, `LastName` varchar(20) DEFAULT NULL, `Age` int(11) DEFAULT NULL, `TotalMarks` int(11) DEFAULT NULL, PRIMARY KEY (`Id`) ) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci 1 row in set (0.00 sec)
Updated on: 30-Jul-2019
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