Create Relationship between Tables

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April 13th, 2008, 09:29 AM

asptips

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Create Relationship between Tables

Hello,

How do I create a script that have a relationship between two tables from the two tables I successfully created below.

Dim addTable1 As String = "CREATE TABLE t1(idT1 int IDENTITY(1,1) PRIMARY KEY, tField1 nvarchar(50))"
Dim addTable2 As String = "CREATE TABLE t2(idT2 int IDENTITY(1,1) PRIMARY KEY, tField2 nvarchar(50), idT1 int)"

A relationship between idT1 in t1 table and idT1 in t2 table.

cheers,
asptips

April 14th, 2008, 06:36 AM

jmurrayhead

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Have a look at this example: http://msdn2.microsoft.com/en-us/li...za0(VS.80).aspx

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April 16th, 2008, 01:35 AM

asptips

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Quote:

Originally Posted by jmurrayhead

Have a look at this example: http://msdn2.microsoft.com/en-us/li...za0(VS.80).aspx

What if the table already exist? I receive this error "Incorrect syntax near '('."

Dim addTable1 As String = "CREATE TABLE t1(idT1 int IDENTITY(1,1) PRIMARY KEY, tField1 nvarchar(50))"
Dim addTable2 As String = "CREATE TABLE t2(idT2 int IDENTITY(1,1) PRIMARY KEY, tField2 nvarchar(50), idT1 int)"

Dim relateTable As String = "ALTER TABLE t2(FOREIGN KEY idT1 TAG idT1 REFERENCES t1)"

Is my syntax correct?

cheers,
asptips

April 16th, 2008, 06:35 AM

jmurrayhead

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Here's an example:

Code:

ALTER TABLE ORDERS 
ADD FOREIGN KEY (customer_sid) REFERENCES CUSTOMER(SID);

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