Is there an other way to get all rows of a table using a stored procedure unless I pass the procedure a key?
If so, how can I code that in SQL Server?
try this
CREATE PROCEDURE GetData(#key int = null)
BEGIN
SELECT * FROM Table WHERE (#Key Is NULL or id = #Key)
END
You could also use the COALESCE operator:
CREATE PROCEDURE dbo.uspMySprocName(#Key INT = NULL)
AS
BEGIN
SELECT * FROM MyTable WHERE ID = COALESCE(#Key, ID);
END
you can use a if condition and have 2 queries
**syntax:**
if (#key is null ) then
begin
select * from table1 ;
end
else
being
select * from tabel1 where field1 = #key ;
end
endif
The following link should help
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=146620
Related
Below is a snippet of my code.
I am wanting to filter my data based upon a variable.
When I try to run the code, it returns an error of "There is already an object named '#BaseData' in the database.". I am not sure as to why this is the case; I have put extra checks within the IF statements to drop the temp table if it already exists but to no avail.
Are you able to help or provide an alternative solution please?
DECLARE #Variable AS VARCHAR(20) = 'Example1'
IF OBJECT_ID(N'TEMPDB..#BaseData') IS NOT NULL
DROP TABLE #BaseData
IF #Variable = 'Example1'
BEGIN
SELECT
*
INTO
#BaseData
FROM
[Database].[schema].[table]
END
IF #Variable = 'Example2'
BEGIN
SELECT
*
INTO
#BaseData
FROM
[Database].[schema].[table]
WHERE
[column] = 1
END
IF #Variable = 'Example3'
BEGIN
SELECT
*
INTO
#BaseData
FROM
[Database].[schema].[table]
WHERE
[column] = 0
END
While code is compiled by SQL, creation of same #table is found in each condition so it doesn't work.
One possible solution would be to create table and than insert data conditionally.
-- DROP TEMP TABLE IF EXISTS
IF OBJECT_ID(N'TEMPDB..#BaseData') IS NOT NULL
DROP TABLE #BaseData
GO
-- CRATE TEMP TABLE WITH TempId, AND SAME STRUCTURE AS YOUR TABLE
SELECT TOP 0 CONVERT(INT, 0)TempId, * INTO #BaseData FROM TestTable
-- DECLARE VARIABLE
DECLARE #Variable AS VARCHAR(20)= 'Example1'
-- INSERT DATA IN TABLE DEPENDING FROM CONDITION
IF (#Variable = 'Example1')
BEGIN
INSERT INTO #BaseData SELECT * FROM TestTable
END
IF (#Variable = 'Example2')
BEGIN
INSERT INTO #BaseData SELECT * FROM TestTable WHERE Id = 1
END
IF (#Variable = 'Example3')
BEGIN
INSERT INTO #BaseData SELECT * FROM TestTable WHERE Id = 2
END
I have a query in SQL Server 2008 like below:
declare #checkValue int = 1
IF (#checkValue = 1)
(
IF OBJECT_ID('tempdb..#newtable') IS NOT NULL DROP TABLE #newtable
Select Id
into #newtable
From #oldtable
);
This is not working since the second if clause which is inside the main IF clause. How can I fix it and use nested if statements like that?
Any help would be appreciated. Thanks
Almost, but you need BEGIN and END instead of parenthesis:
declare #checkValue int = 1
IF (#checkValue = 1)
BEGIN
IF OBJECT_ID('tempdb..#newtable') IS NOT NULL DROP TABLE #newtable
Select Id
into #newtable
From #oldtable
END;
I'm trying to make a conditional select statement, and the parameter I'm conditioning on is the column I want to return. Meaning - if something about a column in a table is true, I want to return that column; if not, I want to return the other column.
Ex:
IF table.obj_param_A = ?
BEGIN
SELECT obj_param_A FROM table
END
ELSE
BEGIN
SELECT obj_param_B FROM table
END
I know this doesn't work, but it's the general idea of what I want. Any idea how to structure this properly?
If you do not concern the column name returned, you can use CASE
SELECT
CASE
WHEN obj_param_A = ? THEN obj_param_A
ELSE obj_param_B
END AS value
FROM table
Below is an example of how you can use the table information about a specific column in order to select from specific columns.
Drop Table dbo.Test
Create Table dbo.Test (iVersion int, iVersion2 smallmoney)
Insert Into dbo.Test
Select 1, 1.12
Declare #Test as nvarchar(200)
Select #Test = Column_Name from information_schema.columns where Table_Schema = 'dbo' and table_name = 'test' and Ordinal_Position = 1
--IF (#Test = 'iVersion') --Equal To iVersion
IF (#Test != 'iVersion') ---Not Equal To iVersion
BEGIN
SELECT iVersion FROM dbo.Test
END
ELSE
BEGIN
SELECT iVersion2 FROM dbo.Test
END
This should return the data from iVersion2 since the Name of the First column is "iVersion" and the If Statement returns iVersion only if it is not the first column
I have a stored procedure that I would like to query either the production or the "work in progress" table, based on the parameter I am passing in. I could write two separate stored procedures, but I thought this was worth a try.
something along the lines of:
create procedure getUserDetails
#userID int,
#prod varchar(5)
as
begin
select * from
if (#prod = 'true')
Begin
userprod_table
else
userwip_table
end
where something = 'something'
END
Is this at all possible? I wouldn't want to write 2 SP that are almost identical :-/
Why not use a simple if(#prod = 'true') statement like below:
if (#prod = 'true')
begin
select * from userprod_table where something = 'something'
end else
begin
select * from userwip_table where something = 'something'
end
You could use a CTE so that your main query isn't repeated
with usertable as
(
select * from userprod_table where 1 = #flag
union
select * from userwip_table where 0 = #flag
)
select ... from usertable ...
Is it possible to have a if condition in VIEWS
eg
CREATE VIEW
as
DECLARE #Count int
SET #Count=-1
select #Count=EmpID from EmployeeDetails where ID=200
IF #Count=-1
BEGIN
SELECT * FROM TEAM1
END
ELSE
BEGIN
SELECT * FROM TEAM1
END
You could try something sneaky with a UNION :
SELECT {fieldlist}
FROM Table1
WHERE EXISTS(SELECT EmpID FROM EmployeeDetails WHERE ID = 200)
UNION ALL
SELECT {fieldlist}
FROM Table2
WHERE NOT EXISTS(SELECT EmpID FROM EmployeeDetails WHERE ID = 200)
This method would require both SELECT statements to return the same set of fields, although their sources might be different.
Views only allow select statements as stated in here
if you need to do if on column values you can use a
SELECT
CASE WHEN COLUMN1 = 1 THEN COLUMNX ELSE COLUMNY END
FROM TABLE1
if your need exceeds this you should create a select from a table valued function instead of a view.
What you need is a simple Procedure
CREATE PROCEDURE DOSOMETHING
(
#ID INT
)
AS
BEGIN
IF #ID > 100
SELECT 1 AS ID,'ME' AS NAME, GETDATE() AS VARIABLEDATECOL, NEWID() AS VARIABLEGUID
ELSE
SELECT 2 AS ID, 'YOU' AS NAME
END
No I don't believe this is possible.
You could use a stored procedure instead to achieve this functionality.
simply use a udf (User defined Function)
Here you can use IF, ELSE, WHILE etc.
But when you are manipulating data (INSERT, UPDATE, DELETE) then you have to use Stored Procedures because udf's aren't able to do that