![]() Executing the show columns script gives us the following results. ALTER TABLE `members` ADD COLUMN `credit_card_number` VARCHAR(25) Įxecuting the above script in MySQL against the Myflixdb adds a new column named credit card number to the members table with VARCHAR as the data type. We can use the script shown below to add a new field to the members table. The script shown below helps us to do that. Let’s first look at the structure of the members table before we make any amendments. Towards that end, we have been asked to add a field for the credit card number in our members table. Let’s suppose that Myflix has introduced online billing and payments. “ADD COLUMN `column_name` `data_type`” is the command that tells MySQL server to add a new column named `column_name` with data type `data_type’.“ALTER TABLE `table_name`” is the command that tells MySQL server to modify the table named `table_name`.The basic syntax used to add a column to an already existing table is shown below ALTER TABLE `table_name` ADD COLUMN `column_name` `data_type` We can use the alter command to change the data type of a field from say string to numeric, change the field name to a new name or even add a new column in a table. The alter command comes in handy in such situations. They don’t want to lose the existing data but just want to incorporate the new information. Our database users are using it and then they realize some of the vital information was left out in the design phase. Let’s suppose that we have completed our database design and it has been implemented. The alter command is used to modify an existing database, table, view or other database objects that might need to change during the life cycle of a database. MySQL provides the ALTER function that helps us incorporate the changes to the already existing database design. As business requirements change, Database designs need changing as well. With time business requirements change as well. In this tutorial, you have learned how to rename a table in a database using the sp_rename stored procedure and SQL Server Management Studio.As the saying goes Change is the only constant Second, type the new name of the table e.g., product_archive and press Enter: The following example illustrates how to rename the product_history table to product_archive.įirst, right-click on the table name and choose Rename menu item: SQL Server rename table using SSMSĪnother way to rename a table is to use the function provided by SQL Server Management Studio. However, it renamed the table successfully. SQL Server returns the following message: Caution: Changing any part of an object name could break scripts and stored procedures. Second, use the sp_rename stored procedure to rename the ntr table to contracts in the sales schema: EXEC sp_rename 'ntr', 'contracts' Note that both the old and new name of the table whose name is changed must be enclosed in single quotations.įirst, create a new table named ntr for storing sales contract’s data: CREATE TABLE ntr ( The following shows the syntax of using the sp_rename stored procedure for changing the name of a table: EXEC sp_rename 'old_table_name', 'new_table_name'Ĭode language: SQL (Structured Query Language) ( sql ) However, it does provide you with a stored procedure named sp_rename that allows you to change the name of a table. SQL Server does not have any statement that directly renames a table. Summary: in this tutorial, you will learn how to rename a table using Transact SQL and SQL Server Management Studio.
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