![]() MySQL RENAME TABLE examplesįirst, we create a new database named hr that consists of two tables: employees and departments for the demonstration. We will discuss this in more detail in the following examples. In addition, you must manually adjust other database objects such as views, stored procedures, triggers, foreign key constraints, etc., that reference to the table. ![]() #Mysql rename column codeIf the name of the table changes, so the application code that refers to the table name needs to be changed as well. For example, you should investigate which applications are using the table. In terms of security, any existing privileges that we granted to the old table must be manually migrated to the new table.īefore renaming a table, you should evaluate the impact thoroughly. Note that you cannot use the RENAME TABLE statement to rename a temporary table, but you can use the ALTER TABLE statement to rename a temporary table. In addition to the tables, we can use the RENAME TABLE statement to rename views.īefore we execute the RENAME TABLE statement, we must ensure that there is no active transactions or locked tables. If the new table new_table_name does exist, the statement will fail. The old table ( old_table_name) must exist, and the new table ( new_table_name) must not. You have successfully changed the name of the column, changed the data type to y_data_type, and positioned the column after column_x.RENAME TABLE old_table_name TO new_table_name Code language: SQL (Structured Query Language) ( sql ) ![]() For example: ALTER TABLE your_table_name CHANGE original_column_name new_col_name y_data_type AFTER column_x The CHANGE also allows you to place the column in a different position in the table by using the optional FIRST | AFTER column_name clause. Use additional options to further manipulate table columns. The MySQL ALTER TABLE statement is also used to rename a table. The data_type element is mandatory, even if you want to keep the existing datatype. The MySQL ALTER TABLE statement is used to add, modify, or drop/delete columns in a table. It can be used to rename a column and change the data type of that column with the same command.Įnter the following command in your MySQL client shell to change the name of the column and its definition: ALTER TABLE your_table_name CHANGE original_column_name new_col_name data_type The CHANGE clause offers important additions to the renaming process. ![]() If you need additional functions, such as changing the data definition, or position of a column, you need to use the CHANGE clause instead. The RENAME COLUMN clause can only be used to rename a column. ALTER TABLE RENAME is the existing syntax to rename the entire table. Note: The word COLUMN is obligatory for the ALTER TABLE RENAME COLUMN command. Keep in mind that you cannot rename a column to a name that already exists in the table. To change a column name, enter the following statement in your MySQL shell: ALTER TABLE your_table_name RENAME COLUMN original_column_name TO new_column_name Įxchange the your_table_name, original_column_name, and new_column_name with your table and column names. This clause is available since MySQL version 8.0. The simplest way to rename a column is to use the ALTER TABLE command with the RENAME COLUMN clause. #Mysql rename column how toHow to Use the RENAME COLUMN Clause (MySQL 8.0) The commands are straightforward, and you may use the clause that fits your requirements best. The difference is that the CHANGE clause can also be used to alter the data types of a column. The RENAME COLUMN and CHANGE clause both allow for the names of existing columns to be altered. The function that concerns us the most is how to utilize ALTER TABLE to rename a column.Ĭlauses give us additional control over the renaming process. You can use it to add or delete columns, change the type of data within the columns, and even rename entire databases. ![]() Rename MySQL Column with ALTER TABLE CommandĪLTER TABLE is an essential command used to change the structure of a MySQL table. ![]()
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