As mentioned earlier, this syntax is for MySql, not SQL Server. If you want to drop primary key constraint in SQL Server, run the following query. ALTER TABLETable1 DROP CONSTRAINTPK_Table1_Col1 GO Let us now pursue the complete example. First, we will create a table that has primary ...
SQL Copy Here we get the constraints name that we have created. Now we are able to drop the constraints by using the above name. alter table STUDENT_DETAILS drop constraint DF__STUDENT_D__IS_RE__3846C6FF SQL Copy Now we are able to drop the column by using the below query. alter ...
The DROP TABLE command might be used to delete a table stored in an SQL database. We can also delete multiple tables in SQL simultaneously if needed. This can be done with the help of a single DROP command followed by the names of the tables separated by commas that need to be deleted...
Active Directory problem: Check if a user exists in C#? Active Directory User does not assign User logon name and User Principal Name AD LDS cannot ChangePassword, but it can SetPassword Add <?xml version="1.0" encoding="UTF-8" standalone="yes"?> to my xml response Add a Constraint ...
between two tables. A foreign key does this by requiring that values in the column on which it applies must already exist in the column that it references. In the following example, the foreign key constraint requires that any value added to theownerIDcolumn must already exist in thememberID...
add image name into the drop down list Add JavaScript & CSS in UserControl Add multiple location paths into the web.config Add new column in existing CSV file using C# Add query string when user clicks back button Add Reference Issue Add rows to a Table in run time , one by one Add ...
To find the constraint name in SQL Server, use the viewtable_constraintsin theinformation_schemaschema. The columntable_namegives you the name of the table in which the constraint is defined, and the columnconstraint_namecontains the name of the constraint. The columnconstraint_typeindicates the ...
@sql_3 = STUFF((SELECTN'; '+ N'ALTER TABLE ['+ tab_con.TABLE_SCHEMA + N'].['+ tab_con.TABLE_NAME + N'] DROP ['+ ref_con.CONSTRAINT_NAME + N'] ' FROMINFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS ref_con LEFTJOININFORMATION_SCHEMA.TABLE_CONSTRAINTS tab_con ...
ALTER TABLE dbo.MainTable DROP CONSTRAINT CK_Table_NVarCharMaxColumn Update the collation After all that work we can now issue simple ALTER TABLE … ALTER COLUMN … statements to update the collation for each column in our database. Here is the script to perform this operation. ...
Here we have all the information we set previously to be logged, only this time we also got the procedure field filled out and of course the SQL Server “friendly” technical message that we have a violation: Violation of PRIMARY KEY constraint ‘PK_Sales_1′. Cannot insert duplicate key ...