Case statment in T-SQL?

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Hi how can I convert my if statement in SQL Server using case statment?

SQL

'check nvoice date and due date
IF table1.invoiceDate <= table2.dueDate then
'delivered'
end if

if table1.invoiceDate >= table2.dueDate then
'Late Delivery'
end if

IF table2.dueDate <= CONVERT(VARCHAR,GETDATE(),110) then
'on due'
end if

please anyone help?

Posted 14-Apr-14 21:05pm

Cuculala

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Peter Leow · Answer 1 · 2014-04-14T21:12:00

Solution 1

Refer:
CASE (Transact-SQL)[^]

Posted 14-Apr-14 21:12pm

Peter Leow

Updated 14-Apr-14 21:50pm

v2

Comments

Cuculala 15-Apr-14 3:18am

Thanks Peter Leow, Is that possible if my case is the column name of my table 2? for example;
CASE [Due Date]
WHEN CONVERT(VARCHAR,[Invoice Date],110) >= CONVERT(VARCHAR,[Due Date],110) THEN 'On time delivery'

Peter Leow 15-Apr-14 3:53am

In your example, you do not have to place the column name after CASE, just
CASE WHEN CONVERT(VARCHAR,[Invoice Date],110) >= CONVERT(VARCHAR,[Due Date],110) THEN 'On time delivery'
I have provided a new link in the solution which is more applicable to your case.

Kabi Pr. Sahoo · Answer 2 · 2014-04-14T21:43:00

Solution 2

This might helps you...

SQL

case
    when table1.invoiceDate <= table2.dueDate Then 'Delivered'
    else when table1.invoiceDate >= table2.dueDate Then 'Late Delivery'
    else when table2.dueDate <= CONVERT(VARCHAR,GETDATE(),110) Then 'on due'
 End

Posted 14-Apr-14 21:43pm

Kabi Pr. Sahoo

Comments

Cuculala 15-Apr-14 4:28am

i tried your codes and i got this exception ;
Incorrect syntax near the keyword 'when'.

SELECT [Supplier],[tbl_purchaseOrders].[Purchase Order No],[Date Ordered],[Due Date],[Terms of Payment],
case
when [Invoice Date] <= [Due date] Then 'Delivered'
else when [Invoice Date] >= [Due Date] Then 'Late Delivery'
else when [Due Date] <= CONVERT(VARCHAR,GETDATE(),110) Then 'on due'
end as [Status]
from tbl_invoice,tbl_purchaseOrders

Kabi Pr. Sahoo 15-Apr-14 6:40am

This is your query...Just check it..
SELECT upplier,tbl_purchaseOrders.Purchase Order No,Date Ordered,
Due Date,Terms of Payment,
case when Invoice Date <= Due date
then 'Delivered'
else
case when Invoice Date >= Due Date
then 'Late Delivery'
else
case when Due Date <= CONVERT(VARCHAR,GETDATE(),110)
then 'on due'
end
end
end
as Status from tbl_invoice,tbl_purchaseOrders

Cuculala 16-Apr-14 0:57am

that's a part of my sub query please ignore select as