To remove a constraint, use theDROP CONSTRAINTclause in theALTER TABLEstatement. If you wish to drop the unique constraint on the “Email” column: <br> ALTER TABLE Customers<br> DROP CONSTRAINT UQ_Email;<br> 4.
Sql Server 可以用 exec sp_rename '表名称.原列名','新列名','column';
● How to Rename a Column That Has Some Dependent Objects? ● How to Use RENAME COLUMN Command to Rename Several Columns in PostgreSQL? So, let’s get started. How to Use RENAME COLUMN Command to Rename Columns in PostgreSQL? The“RENAME COLUMN”command can also be used as“RENAME”. The...
Symptoms Assume that you back up a database that has change data capture enabled. You restore this database to an instance of SQL Server that does not support change data capture. When you try to rename a column in a table in the database,...
To rename a column In Object Explorer, right-click the table to which you want to add columns and chooseDesign. The table opens in Table Designer. UnderColumn Name,select the name you want to change and type a new one. The column is renamed in your table as soon as you exit the cell...
Use thesp_renamesystem stored procedure to rename a column. Just watch out for any objects that depend on the column name. Add Column with the SQL ALTER TABLE STATEMENT The ALTER TABLE command supports adding columns to an existing table. Unless you specify a default value, the column should...
2. In SQL Server In SQL Server, we can use the ALTER DATABASE statement to rename a database: ALTER DATABASE [OldDatabaseName] MODIFY NAME = [NewDatabaseName]; We replace [OldDatabaseName] and [NewDatabaseName] with old and new database names. Before renaming, we must ensure there...
SQL Server Basics How to Insert Data How to Update Data How to Delete Data Database Management How to Create a Table How to Drop a Table How to Rename a Table How to Truncate a Table How to Duplicate a Table How to Add a Column How to Drop a Column How to Rename a Column How to...
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Thesp_renameis a stored procedure which helps to rename tables in SQL Server and the usage syntax will be like the below: 1 sp_rename'old_table_name','new_table_name' The result outputs of this procedure might be 0 or non-zero values. 0 value indicates that the procedure execution succ...