I am setting a stored procedure for select and I want to update the value of one column in the database Before doing the Select.
This is what I tried but it's not working.
#roleID int and #query varchar(240)
SELECT
EP.Equipe_Projet_Id AS PROJET_ID,
U.USR_ID,
CleRepartition = CASE
WHEN #RoleID = 1 AND #query IS NOT NULL
THEN 100
AND (UPDATE EQUIPE_PROJET SET CleRepartition = 100
WHERE EP.Equipe_Projet_Id = #PROJET_ID AND EP.Role_Id = 3)
ELSE NULL
END
FROM
[EQUIPE_PROJET] EP
Expecting update of column on database and having it's value
i want to update the value of Column CleRepartition in the database while selecting.
This is not possible in a SELECT query. A SELECT retrieves data from the database. An UPDATE modifies data. These are two separate statements and cannot be combined.
You are doing this work in a stored procedure. Within a stored procedure, you can run an UPDATE and SELECT in any order, so you can accomplish both tasks. If you are concerned about data changing in the database between the two statements, you can wrap them in a transaction.
Stored procedure can do update then select after.
So I added the query of update in the beginning, then I do the select.
Like this:
UPDATE EP
SET CleRepartition = CASE
WHEN #RoleID = 1 AND #query IS NOT NULL
THEN 100
AND (UPDATE EQUIPE_PROJET
SET CleRepartition = 100
WHERE EP.Equipe_Projet_Id = #PROJET_ID
AND EP.Role_Id = 3)
ELSE NULL
END
FROM [EQUIPE_PROJET] EP
SELECT
EP.Equipe_Projet_Id AS PROJET_ID,
U.USR_ID,
CleRepartition
FROM
[EQUIPE_PROJET] EP
I hope that this will help someone.
Related
O.F.,
So I have been attempting to build a trigger that will update a table based on the when a a row is updated in a different table. The trigger so far looks like this.
ALTER TRIGGER [dbo].[tst_update_USCATVLS_6]
ON [dbo].[IV00101]
AFTER UPDATE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE #ITEMNUMBER VARCHAR(75)
SET #ITEMNUMBER = (SELECT ITEMNMBR FROM dbo.IV00101 WHERE DEX_ROW_TS = (SELECT MAX(DEX_ROW_TS) FROM dbo.IV00101))
UPDATE dbo.EXT00101 SET STRGA255 = (RTRIM(LTRIM(STRGA255))) + '_0' WHERE PT_UD_KEY = #ITEMNUMBER AND PT_UD_Number = 2
What seems to happen when I run the test update like the one below.
UPDATE PDM.TEST.dbo.IV00101
SET USCATVLS_6 = 'OBSOLETE'
WHERE ITEMNMBR = 'HMLGDN-7563252-4'
Is that the trigger fires but updates the desired column twice. The end result being this 20025947756319_0_0 instead of this 20025947756319_0.
The weird part of all of this is if I drop the trigger and run the same test update and then run the update statement that was in the trigger all statements execute and the data is updated as desired.
So running this as one block of code works:
UPDATE PDM.TEST.dbo.IV00101
SET USCATVLS_6 = 'OBSOLETE'
WHERE ITEMNMBR = 'HMLGDN-7563252-4'
DECLARE #ITEMNUMBER VARCHAR(75)
SET #ITEMNUMBER = (SELECT ITEMNMBR FROM PDM.TEST.dbo.IV00101 WHERE DEX_ROW_TS = (SELECT MAX(DEX_ROW_TS) FROM PDM.TEST.dbo.IV00101))
UPDATE PDM.TEST.dbo.EXT00101 SET STRGA255 = (RTRIM(LTRIM(STRGA255))) + '_0' WHERE PT_UD_KEY = #ITEMNUMBER AND PT_UD_Number = 2
If any one can help me figure out why this is happening I would greatly appreciate it.
Kindest regards,
Z.
Having read Sean Lange's Comments I looked up inserted and deleted tables. I saw reference to these tables before but didn't realize they were temporary tables and thought they were physical tables of the database in the example/answers I saw. Anyway I created a trigger to show the data in each which helped me see how to join them to the update statement in the trigger. All the code is below.
Trigger to see what was in Inserted and Deleted as well as the join referencing the Inserted table:
ALTER TRIGGER [dbo].[inserted_deleted_Table]
ON [dbo].[IV00101]
AFTER UPDATE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
select 'NEW DATA', * from inserted --new data
select 'OLD Data', * from deleted --old data
select 'iv00101', * From iv00101 as i JOIN inserted as u on i.itemNmbr = u.itemNmbr and i.DEX_ROW_TS = u.DEX_ROW_TS
-- Insert statements for trigger here
END
The end solution was to remove this peice of code:
SET #ITEMNUMBER = (SELECT ITEMNMBR FROM INV00101 WHERE DEX_ROW_TS = (SELECT MAX(DEX_ROW_TS) FROM INV00101 ) AND USCATVLS_6 ='OBSOLETE' )
And then Add a the FROM clause to the UPDATE Statement:
UPDATE PDM.TEST.dbo.EXT00101 SET STRGA255 = (RTRIM(LTRIM(STRGA255))) + '_0'
FROM (
SELECT u.ITEMNMBR ,
u.DEX_ROW_TS
From iv00101 as i JOIN inserted as u on i.itemNmbr = u.itemNmbr and i.DEX_ROW_TS = u.DEX_ROW_TS) as p
WHERE PT_UD_KEY = p.ITEMNMBR AND PT_UD_Number = 2
Once I figured out that insert and deleted table were temp tables not actual tables in a DB all the pieces sorta fell into place. Thanks for pointing me in the direction I needed to go #Sean Lange.
Best Regards,
Z.
I have a table (dbo.membersdatatable) that has multiple columns. I would like this trigger to update a column called "memberstatus" when "memberdesignation" is updated to a value of "10" from a value of "9".
-------SQL STATEMENT BELOW---------------
IF UPDATE([MemberDesignation])
--need to make it so it will recognize when memberdesignation = 10
UPDATE dbo.MembersDataTable
SET MemStatus = '0'
FROM dbo.MembersDataTable AS mdtbl
INNER JOIN inserted AS i ON i.StudentID = mdtbl.StudentID
Use triggers SPARINGLY. For example, my system has 138 tables, 550 stored procedures and only 28 triggers. I wish I had less.
But if you decide a trigger is required, it will look something like this:
CREATE TRIGGER [t_MemberDesignationSideEffect] ON [dbo].MembersDataTable
FOR UPDATE
AS
SET NOCOUNT ON
IF NOT ( UPDATE([MemberDesignation]) ) RETURN
-- REMINDER: All triggers can and will fire for a set of rows...not just one
UPDATE mdtbl
SET MemStatus = '0'
FROM inserted i
JOIN dbo.MembersDataTable mdtbl on i.StudentID = mdtbl.StudentID
JOIN deleted d on d.StudentID = mdtbl.StudentID
WHERE i.memberdesignation = '10'
and d.memberdesignation = '9'
GO
You are writing an update trigger on table. Here you can use deleted and inserted magic tables. In case of update trigger:
Deleted table contains the row as it was before the UPDATE statement.
Inserted table contains the row as it is after the UPDATE statement.
create trigger update_member_status
on membersdatatable
for update
as
begin
declare #old_designation int
declare #new_designation int
set #old_designation = (select memberdesignation from deleted)
set #new_designation = (select memberdesignation from inserted)
if (#old_designation = 9 and #new_designation = 10)
begin
update membersdatatable
set memstatus = '0'
from membersdatatable as mdtbl
inner join inserted as i on i.StudentID = mdtbl.StudentID
end
end
You are going to update member status of all rows with a
memberdesignation = 10
you can probably add conditions to this query in order to update only the ones you want by using a date field or another
Simply call this procedure after updating your table
CREATE PROCEDURE USP_MemberStatusRules()
AS
UPDATE dbo.MembersDataTable
SET MemStatus = '0'
WHERE memberdesignation = 10
AND .....
AND .....
GO
I need to check for the status change of a certain column in the table
I can do it using while loop, where i can get the column value and check the value and break from the loop if value is changed.
i am using SQL server 2008.
is there a better way?
Here is the sample sql query
declare #status int = 1
select #status = status from MyTable with (nolock) where Id = 100034
while #status <> 3
begin
WAITFOR DELAY '00:01'
select #status = status from MyTable with (nolock) where Id = 100034
end
Have you considered to use a trigger instead of an stored procedure? This is exactly, what are triggers for.
CREATE TRIGGER reactOnStatus3
ON MyTable
AFTER INSERT, UPDATE, DELETE
AS
BEGIN
IF Status = 3
EXEC DoTheMagicStoredProcedure;
END;
I have next t-sql code
UPDATE
#f_contr_temp
SET
sum_percent = (EXEC get_f_contr_credit_delay_pz fct.f_contr, #date_loop, #sum_percent OUTPUT)
FROM
#f_contr_temp AS fct,
f_garanty AS fg
WHERE
fct.f_contr = fg.f_contr
Im trying to update sum_percent column but throw an exception what i can't execute procedure in update.
I have no idea, how update my column. Please help.
Use a temporary table to store result of your S.P. as follow:
CREATE TABLE #temp (percentage decimal(18,9))
INSERT INTO #temp
(EXEC get_f_contr_credit_delay_pz fct.f_contr, #date_loop, #sum_percent OUTPUT)
UPDATE
#f_contr_temp
SET
sum_percent = (select top 1 percentage from #temp)
FROM
#f_contr_temp AS fct,
f_garanty AS fg
WHERE
fct.f_contr = fg.f_contr
I suppose your S.P. return values, so I use TOP 1 command to get only the first.
Pay attention fct.f_contr, which is its source? In this way the query is not correct.
I'm building a stored procedure. This stored procedure needs to insert a record if a record with a specific value does not exist. If the value does exist, I need to update the record. The problem I'm having is determining if a record with the given value exists or not. I am using the following code:
DECLARE #record1ID as char(36)
SET #record1ID = (SELECT TOP 1 ID FROM Person WHERE [Role]='Manager')
DECLARE #record2ID as char(36)
SET #record2ID = (SELECT TOP 1 d.ID FROM Department d WHERE d.[ManagerID]=#record1ID)
-- If #record2ID is set update record, otherwise add record
-- how do I setup this if/else statement?
Thank you!
If this were a SQL Server as it looks like, you could do a count like this:
declare #rec_counter as int
set #rec_counter = 0
select #rec_counter = count(*) FROM Department d WHERE d.[ManagerID]=#record1
if (#rec_counter > 0)
begin
-- do whatever here
end
IF (EXISTS YOUR_SELECT)
BEGIN ...
or
IF (#record2ID IS NULL)
BEGIN ...
or use select count(*) instead of selecting a value