write multiple conditions in a single sql query

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I am new to sql. I am in a situation where i have to put three different conditions in a single query. If any of the below conditions retreive records MessageBox should be shown "Records Retreived" else "Nothing Retreived".

Condition 1 :

C#

"Select Name, Age from Table1 where Class = '1st' and Date between #"+1st_Date.ToString() +"# and #"+2nd_Date.ToString() +"#" .

Condition 2 :

C#

"Select Name, Age from Table1 where Class = '2nd' and Date between #"+1st_Date.ToString() +"# and #"+2nd_Date.ToString() +"#"

.

Condition 3 :

C#

"Select Name, Age from Table1 where Class = '2nd' and Date > #"+1st_Date.ToString()+"# and Date  < #"+2nd_Date.ToString()+"#"

My question is how to write these three conditions in a single query. Hope you understand my question. I am searching for the answer for very long but all in vain. I will be very thankful of yours.

Posted 21-Jun-13 19:39pm

Harpreet_125

Updated 24-Jun-13 19:42pm

Maciej Los

v3

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sudipta biswas 22-Jun-13 1:51am

You are trying to get data of 1st or 2nd class and between the two dates. Is that correct?

2 solutions

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OriginalGriff · Answer 1 · 2013-06-21T19:48:00

Use the OR operator:

SQL

Select Name, Age from Table1 where 
(Class = '1st' and Date between #"+1st_Date.ToString() +"# and #"+2nd_Date.ToString() +"# ) OR
(Class = '2nd' and Date between #"+1st_Date.ToString() +"# and #"+2nd_Date.ToString() +"# ) OR
(Class = '2nd' and Date > #"+1st_Date.ToString()+"# and Date < #"+2nd_Date.ToString()+"#)

db_developer · Answer 2 · 2013-06-24T13:09:00

Solution 2

SQL

SELECT
(CASE WHEN
EXISTS
(
SELECT condition 1
UNION ALL
SELECT condition 2
UNION ALL
SELECT condition 3
)
THEN
'Records retreived'
ELSE
'Nothing retreived'
END)
AS MessageBoxText

Posted 24-Jun-13 13:09pm

db_developer

Updated 24-Jun-13 19:40pm

v2