In this post, I am sharing a command to swap the table in a MySQL Database.

Recently, I got a requirement like a swap or rename the table, it should execute in a lock/transaction. People can access the table before or after the swapping only.

In an ETL/Database work, we are creating a staging table for validation and later it requires to overwrite with an original table name.

Below is a simple command, which you can use for this task:
Here, DBRND_Original is an existing table and DBRND_Original_New is my staging table.
Now, I am swapping the table using one rename command which performs whole swapping operation in one transaction.

RENAME TABLE DBRND_Original TO DBRND_Original_Backup, DBRND_Original_New To DBRND_Original;

In this post, I am sharing a T-SQL script for renaming multiple tables to a SQL Server Database.

Recently, I was doing test migration for more than 100 tables. I planned to rename those tables before migration so later I can rollback those tables.

SQL Server: Script to rename Database Name, Table Name, Column Name

I used below script for renaming multiple tables of a database where I am adding “_backup” in the table name.

DECLARE @SQL NVARCHAR(max)=''

SELECT @SQL += 'exec sp_rename ' + NAME + ',' + NAME + '_backup '
FROM   sys.tables
WHERE  NAME IN ( 'table_one', 'table_two', 'table_three')

EXEC sp_executesql @SQL

In this post, I am sharing a simple solution to move your InnoDB table from one database to another database in MySQL.

Before a few days ago, one of my team members was looking for this solution, and I found that many of Database Administrators do not know about this simple solution.
The solution is, we have to just rename the table name by specifying a database name.

The MySQL InnoDB engine has two types of tablespaces, one is a shared table space and second is an individual tablespace for each table.
This solution works for both the types of tablespaces.

Important Note: ibdata1 file or all .ibd file should be in one MySQL Data Directory at the same location.

After this demonstration, you can visit InnoDB Tablespace related articles.

Create TWO Sample Databases:

CREATE DATABASE ABC;
CREATE DATABASE XYZ;

Create a sample table in database ABC:

USE ABC;

CREATE TABLE tbl_Students
(
	RNO INT 
	,StudName VARCHAR(20)
);

INSERT INTO tbl_Students
VALUES 
(1,'Anvesh'),(2,'Neevan')
,(3,'Jeeny'),(4,'Roy');

Simplest way to move tbl_Students from database ABC to XYZ:

RENAME TABLE ABC.tbl_Students TO XYZ.tbl_Students;

Check tbl_Students in XYZ database:

USE XYZ;

SELECT *FROM tbl_Students;
+------+----------+
| RNO  | StudName |
+------+----------+
|    1 | Anvesh   |
|    2 | Neevan   |
|    3 | Jeeny    |
|    4 | Roy      |
+------+----------+

MySQL: Why InnoDB Engine stores all databases in one file (ibdata1)?

MySQL: The Truth about InnoDB File Per Table Tablespaces