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 ...
When designing an SQL database, there may be cases where you want to impose restrictions on what data can be added to certain columns in a table. SQL makes this possible through the use ofconstraints. After applying a constraint to a column or table, any attempts to add data to the colu...
Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a large (100 million rows) table with default constraint adding a extra column in a pivot table created uisng T-SQL Pivot Table query Adding a partition scheme to an existing table. Adding a Value to a 'date' C...
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 ...
ML 2007-05-18 re: SQL Server 2005: How to have a Unique Constraint with multiple NULLS on a column Careful there, you should know by now that I look like Celko. In the nicest possible way. :) Mladen 2007-05-18 re: SQL Server 2005: How to have a Unique Constraint with multiple ...
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 ...
@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. ...
transactional replication, altering a primary key is disallowed and results in an error ('Msg 4929, Level 16, State 1, Line 1 Cannot alter the table 'tPersonnel' because it is being published for replication. Msg 3727, Level 16, State 0, Line 1 Could not drop constraint. See previous ...
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 ...