Pattern based constraint : Check « Constraints « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Constraints » Check 
7. 5. 11. Pattern based constraint
5>    CREATE TABLE Customers
6>    (
7>       CustomerNo     int     IDENTITY   NOT NULL
8>          PRIMARY KEY,
9>       CustomerName   varchar(30)        NOT NULL,
10>       Address1       varchar(30)        NOT NULL,
11>       Address2       varchar(30)        NOT NULL,
12>      City            varchar(20)        NOT NULL,
13>      State           char(2)            NOT NULL,
14>      Zip             varchar(10)        NOT NULL,
15>      Contact         varchar(25)        NOT NULL,
16>      Phone           char(15)           NOT NULL,
17>      FedIDNo         varchar(9)         NOT NULL,
18>      DateInSystem    smalldatetime      NOT NULL
19>    )
20>    GO
1>    ALTER TABLE Customers
2>       WITH NOCHECK
3>       ADD CONSTRAINT CN_CustomerPhoneNo
4>       CHECK
5>       (Phone LIKE '([0-9][0-9][0-9]) [0-9][0-9][0-9]-[0-9][0-9][0-9][0-9]')
6> go
1>
2>
3>    ALTER TABLE Customers
4>       CHECK
5>       CONSTRAINT CN_CustomerPhoneNo
6>
7> GO
1>
2> drop table Customers;
3> GO
1>
2>
3>
7. 5. Check
7. 5. 1. Using CHECK Constraints
7. 5. 2. Adding a CHECK Constraint to an Existing Table
7. 5. 3. Constraints with name
7. 5. 4. CHECK Clause
7. 5. 5. Check Constraint
7. 5. 6. CHECK (DATEPART(DAY, GETDATE()) < 28)
7. 5. 7. A check constraint uses an expression to qualify records that are acceptable for any Inserts or Updates
7. 5. 8. Use or to link two conditions for check constraint
7. 5. 9. Using a Multicolumn CHECK Constraint
7. 5. 10. Check for data length
7. 5. 11. Pattern based constraint
7. 5. 12. Mark nocheck for a constraint
7. 5. 13. A table-level check constraint that limits Banker IDs to a specific format
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