It is easy to find the primary keys columns in all tables in a database.

can we get the list of primary key columns in 1 row. for example if we have a composite primary key consists of 4 columns, the above query will retrive all 4 of them in 4 rows,

question: could it be in 1 row.

thanx.

WE CAN ALSO WRITE IN OTHER WAY FOR FINDING THE PRIMARY CONSTRAINT NAMES …

SELECT IT.TABLE_NAME ,ITC.CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLES it join INFORMATION_SCHEMA.TABLE_CONSTRAINTS itc ON IT.TABLE_NAME=ITC.TABLE_NAME
WHERE OBJECTPROPERTY(OBJECT_ID(IT.TABLE_NAME),’TableHasPrimaryKey’)=1 AND TABLE_TYPE=’BASE TABLE’ and itc.CONSTRAINT_TYPE=’primary key’

select [name] from SYS.TABLES where [name] not in (
select distinct(TABLE_NAME) from INFORMATION_SCHEMA.TABLE_CONSTRAINTS)

The above query will return all the heap tables.

Thanks & regards,
Vijay

You are absolutely the best SQL server authority.

i am trying to write a function in MS SQL which i will pass table_name and PK value and the function will return me the table(s) where that specified PK of the table is used.

like we have two tables;
item purchase
itemID (PK) itemID (FK)
100 100

the function will return table name purchase if the (itemID=100) is used in it

thanks,

thanks.

I was working on a script that will let me know the order in which I can insert data in to the tables , so that they do not encounter the referential integrity problem. But I have a table that has got both the primary key and foreign key on the same column and as a result my script show the order of insertion for this table to be 3 , where as when I check it with the help of view dependencies in the management studio its order is 4. any suggestion are appreciated.\
— Script———-
DECLARE @Iteration int
SET @Iteration = 1

Select Table_Name,NULL AS InsertOrderRank into #Table
from Information_Schema.Tables Where Table_Type = ‘BASE TABLE’

Select FK.Constraint_Name as FKConstraintName,
FK.Table_Name as TableName,
CUF.Column_Name as ColumnName,
PK.Table_Name as ReferringTableName,
CUP.Column_Name as ReferringTableColumnName
into #FKColumns
from Information_Schema.REFERENTIAL_CONSTRAINTS RC– Foreignkeys
JOIN Information_Schema.TABLE_CONSTRAINTS FK
ON RC.Constraint_Name = FK.Constraint_Name
JOIN Information_Schema.TABLE_CONSTRAINTS PK
ON RC.Unique_Constraint_Name = PK.Constraint_Name
JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE CUF
ON FK.Constraint_Name = CUF.Constraint_Name
JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE CUP
ON PK.Constraint_Name = CUP.Constraint_Name

update T
Set InsertOrderRank = 1
From #Table T
LEFT JOIN #FKColumns F
on T.Table_Name = F.TableName
WHERE F.TableName IS NULL

WHILE ((Select Count(1) from #Table where InsertOrderRank IS NULL) > 0)
BEGIN

UPDATE T1
Set InsertOrderRank = @Iteration + 1
FROM #Table T1
JOIN
(SELECT Distinct T.Table_Name
From #Table T
INNER JOIN #FKColumns F
on T.Table_Name = F.TableName
INNER JOIN #Table T2
on T2.Table_Name = F.ReferringTableName
Group By T.Table_Name
Having Count(Distinct ISNULL(T2.InsertOrderRank,0)) = @Iteration) as T2
on T1.Table_Name = T2.Table_Name

SET @ITeration = @Iteration + 1

END

Select * from #Table
Order By InsertOrderRank

Thanks

Right click on the specified table choose design option. Right click on the column to which you need to create primary key. You will find set primary key option. Just select that.

where n is the nth number, as a Primary Key can have more than one Column

where n is the nth number, as a Primary Key can have more than one Column

you can delete child table records first then parent table through constraint on delete cascade constraints.

You can set this constraints at the same time while creating relationship between two tables.

Thanks
KENSAi

Please post some SQL.

IIUC, you need to ADD a UNIQUE CONSTRAINT to Table B on the PK and FK.

I am going to make a relation between table A and Table B in this relation Table A is my Primary key Table and Table B is my Foreign key table,and in Foreign key table i select one primary key of Table A which should be set as a primary key field in Table A as Primary key table. when i want to make this relation i get this Error : ‘ The column in the table don’t match an Existing primary key or UNIQUE constraint.

Help me please

To get the list of all indexes of a table use the below query:

SELECT ind.*
FROM sys.indexes ind INNER JOIN sys.tables tbl
ON ind.object_id = tbl.object_id
WHERE tbl.name = ‘yourTableName’

To get the list of all index in a database use the sys.indexes table.

Regards,
Pinal Dave

I would like to delete the child table records first then perent
database level, through constraints and triggers.

All these tables has forign key constrains.

Please advise the better way. I am using sql server 2005.

You are correct.

Regards,
Pinal Dave ( http://www.SQLAuthority.com )

What I read on internet, is it is not possible to create a foriegn key constraint referencing table outside database.

I tried myself creating this but had no luck…

The only solution to your problem is triggers.

or create child table in the same database as parent table.

Thanks,
Imran

is it possible