I have a table called Settings with columnA, columnB, columnC, columnD, columnE and their value as followed:
columnA = 1000 columnB = 100 columnC = 200 columnD = 18 columnE = 6
I want to change the value in columnA/B/C when the time is between 18pm to 6am.
I'm thinking of somekind of a trigger that updates the values by looking at the timestamp but I just don't know how to do that. Any ideas?
If you can control the application reading the table then could you create a view that checks the time and returns the values you require?
Something like:
SELECT
[COLUMN1],
CASE
WHEN DATEPART("hh", GETDATE()) BETWEEN 6 AND 14 THEN 1
ELSE [COLUMN2] END AS [COLUMN2],
[COLUMN3]
FROM [TABLE1]
Edit:
If you're querying the table via SQL built within your app you can alter the SQL query to return these values with the CASE above:
CASE
WHEN DATEPART("hh", GETDATE()) BETWEEN 6 AND 14 THEN 1
ELSE [COLUMN2] END AS [COLUMN2],
Related
I want to update 15 records in that first 5 records date should be June 2019,next 5 records with July 2019,last 5 records with Aug 2019 based on employee id,Can any one tell me how to write this type of query in SQL Server Management Studio V 17.7,I've tried with below query but unable to do for next 5 rows..
Like below query
Update TOP(5) emp.employee(nolock) set statusDate=GETDATE()-31 where EMPLOYEEID='XCXXXXXX';
To update only a certain number of rows of a table you will need to include a FROM clause and join a sub-query which limits the number of rows. I would suggest using OFFSET AND FETCH instead of top so that you can skip X number of rows
You will also want to use the DATEADD function instead of directly subtracting a number from the DateTime function GETDATE(). I'm not certain but I think your query will subtract milliseconds. If you intend to go back a month I would suggest subtracting a month rather than 31 days. Alternatively it might be easier to specify an exact date like '2019-06-01'
For example:
TableA
- TableAID INT PK
- EmployeeID INT FK
- statusDate DATETIME
UPDATE TableA
SET statusDate = '2019-06-01'
FROM TableA
INNER JOIN
(
SELECT TableAID
FROM TableA
WHERE EmployeeID = ''
ORDER BY TableAID
OFFSET 0 ROWS
FETCH NEXT 5 ROWS ONLY
) T1 ON TableA.TableAID = T1.TableAID
Right now it looks like your original query is updating the table employee rather than a purchases table. You will want to replace my TableA with whichever table it is you're updating and replace TableAID with the PK field of it.
You can use a ROW_NUMBER to get a ranking by employee, then just update the first 15 rows.
;WITH EmployeeRowsWithRowNumbers AS
(
SELECT
T.*,
RowNumberByEmployee = ROW_NUMBER() OVER (
PARTITION BY
T.EmployeeID -- Generate a ranking by each different EmployeeID
ORDER BY
(SELECT NULL)) -- ... in no particular order (you should supply one if you have an ordering column)
FROM
emp.employee AS T
)
UPDATE E SET
statusDate = CASE
WHEN E.RowNumberByEmployee <= 5 THEN '2019-06-01'
WHEN E.RowNumberByEmployee BETWEEN 6 AND 10 THEN '2019-07-01'
ELSE '2019-08-01' END
FROM
EmployeeRowsWithRowNumbers AS E
WHERE
E.RowNumberByEmployee <= 15
Is there a way for a select statement to include in the WHERE clause a statement that is contained within the table? For example, the following table:
CREATE TABLE test_tab(
date_column DATE,
frequency NUMBER,
test_statement VARCHAR2(255)
)
/
If
MOD(SYSDATE - DATE, frequency) = 0
were contained within the column test_statement, is there a way to select rows where this is true? The test_statement will vary and not be the same throughout the table. I am able to do this in PL/SQL but looking to do this without the use of PL/SQL.
This kind of dynamic SQL in SQL can created with DBMS_XMLGEN.getXML. Although the query looks a bit odd so you might want to consider a different design.
First, I created a sample table and row using your DDL. I'm not sure exactly what you're trying to do with the conditions, so I simplified them into two rows with simpler conditions. The first row matches the first condition, and neither row matches the second condition.
--Create sample table and row that matches the condition.
CREATE TABLE test_tab(
date_column DATE,
frequency NUMBER,
test_statement VARCHAR2(255)
)
/
insert into test_tab values(sysdate, 1, 'frequency = 1');
insert into test_tab values(sysdate, 2, '1=2');
commit;
Here's the large query, and it only returns the first row, which only matches the first condition.
--Find rows where ROWID is in a list of ROWIDs that match the condition.
select *
from test_tab
where rowid in
(
--Convert XMLType to relational data.
select the_rowid
from
(
--Convert CLOB to XMLType.
select xmltype(xml_results) xml_results
from
(
--Create a single XML file with the ROWIDs that match the condition.
select dbms_xmlgen.getxml('
select rowid
from test_tab where '||test_statement) xml_results
from test_tab
)
where xml_results is not null
)
cross join
xmltable
(
'/ROWSET/ROW'
passing xml_results
columns
the_rowid varchar2(128) path 'ROWID'
)
);
This calls for dynamic SQL, so - yes, it is PL/SQL that handles it. I don't think that SQL layer is capable of doing it.
I don't know what you tried so far, so - just an idea: a function that returns ref cursor might help, e.g.
SQL> create table test (date_column date, frequency number, test_statement varchar2(255));
Table created.
SQL> insert into test values (trunc(sysdate), 2, 'deptno = 30');
1 row created.
SQL> create or replace function f_test return sys_refcursor
2 is
3 l_str varchar2(200);
4 l_rc sys_refcursor;
5 begin
6 select test_statement
7 into l_str
8 from test
9 where date_column = trunc(sysdate);
10
11 open l_rc for 'select deptno, ename from emp where ' || l_str;
12 return l_rc;
13 end;
14 /
Function created.
Testing:
SQL> select f_test from dual;
F_TEST
--------------------
CURSOR STATEMENT : 1
CURSOR STATEMENT : 1
DEPTNO ENAME
---------- ----------
30 ALLEN
30 WARD
30 MARTIN
30 BLAKE
30 TURNER
30 JAMES
6 rows selected.
SQL>
A good thing about it is that you could save the whole statements into that table and run any of them using the same function.
You can try this
select * from test_tab where mod(sysdate - date, frequency) = 0;
I am working on an ETL optimization problem and that requires creating a temp table that could be merged with the final table. Currently I have a couple Views that are used to load the final table and that is taking a lot of time. I tried to take the SQL logic from the view and created a temp table and noticed that the values in the temp table do not match the values in the final table. To look deeper I was running count(*) on the view couple of times and noticed that the result for total row count is different for every run by about 10/15 rows give or take. The view has 16 columns from 9 tables which load only once a day. So the time when I run the count(*) the underlying data does not change but the result of the count from the view does change.
This is on a SQL Server 2016 server. I have tried looking into the View logic and nothing stands out as odd. I have tried doing a count(*) on the tables that loads this view and the counts for the tables do not change. I have also tried to create 2 column table from the view logic to simplify the problem and tried an EXCEPT command and that still yields about 20 rows of inconsistent values between the 2 column table created from the same exact view logic.
Here is a reproduction of the VIEW definition that has the row count inconsistency
USE [PROD]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE VIEW Base_View
AS
select
concat(x, y, z)feild1
,*
,ROW_NUMBER() OVER(PARTITION BY a,b ORDER BY some_Date) AS rec_num
,count(a) OVER(PARTITION BY a) AS rec_total
from (
SELECT
case when RESULT='stored value' and e.code is not null then 'x' else '' end x
,case when RESULT='stored value 2' and r.l_id is not null then 'y' else '' end y
,case when RESULT in ('stored value 3','stored value 4') and t.amount is not null then 'z' else '' end z
,case when
CASE WHEN
(m.status = 'stored value 4' OR m.status = 'stored value 5')
AND m.bal < 0
THEN
CASE WHEN DATEDIFF(day,m.due,m.SNAP_DATE) < 0
THEN 0
ELSE DATEDIFF(day,m.due,m.SNAP_DATE)
END
ELSE 0
END=0 AND w.W_ID is null AND m.status<>'stored value 5'
then case
when RESULT in ('stored value 5','stored value 4')
then case when isnull(AMOUNT,0)<>0
then 'abc'
else 'def' end
else 'abc' end
else 'def'
end imp_feild
,result
,es.emp_id
,concat(es.fname,' ',es.lname)task_emp
,concat(e.fname,' ',e.lname)ext_emp
,case when RESULT ='stored value' then t.P_STATUS else null end p_status
,t.CREATE_DATE
,t.l_key
,t.l_id
,m.status
,cast(w.wodate as date)wo_date
,rm.balance refi_balance,rnl.LOAN_key refi_loan,r.effective refi_effective
,case trancode when 'ext' then m.payment else null end ext_amount,e.entered ext_entered,e.effective ext_effective
FROM
(
select t0.*,ROW_NUMBER() OVER(PARTITION BY t0.some_KEY,cast(t0.CREATE_DATE as date),t0.output
ORDER BY t0.some_KEY,cast(t0.CREATE_DATE as date),t0.output ) AS SEQ_NUM
from base_table_1 t0
left join base_table_2 e0
on t0.c_e_key=e0.e_key
where t0.active_rec_ind='Y'
and t0.output in (d,e,f,g)
and (t0.output2 in (j,k)
or ISNULL(e0.some_KEY,'h') in ('u','w'))
) t
join
base_table_3 l
on t.loan_sf_id=l.loan_sf_id
and t.active_rec_ind='Y'
join base_table_4 m
on
t.SOME_DATE=m.SNAP_DATE
and t.L_ID=m.L_ID
left
join base_table_5 es
on t.c_emp_key=es.emp_key
left
join base_table_6 r
on l.l_id=r.l_old_id
and r.entered between dateadd(day,0,cast(t.CREATE_DATE as date)) and dateadd(day,0,t.SOME_DATE)
left
join base_table_7 w
on l.l_id=w.l_id
and w.wodate between cast(t.CREATE_DATE_ETZ as date) and dateadd(day,0,t.SOME_DATE)
left
join base_table_8 wl
on w.l_id=wl.l_id
left
join base_table_8 rnl
on r.l_new_id=rnl.l_id
left
join base_table_8 rol
on r.l_old_id=rol.l_id
left
join base_table_4 rm
on
dateadd(day,-1,r.effective)=rm.SNAP_DATE
and rol.L_ID=rm.L_ID
left
join
(select e0.*,ew.value_1,ew.new_key,ROW_NUMBER() OVER(PARTITION BY e0.L_ID,e0.ENT ORDER BY e0.L_ID,e0.ENT) AS SEQ_NUM
from base_table_9 e0
join base_table_5 ew
on e0.EMP_ID=ew.EMP_ID
where e0.code='a'
) e
on l.sid=e.sid
and e.code='a' and RESULT='stored value 5'
and e.entered between cast(t.CREATE_DATE as date) and dateadd(day,0,t.HOLD_DATE)
AND e.SEQ_NUM=t.SEQ_NUM
and ((isnumeric(e.roll_key)=1 and isnumeric(es.roll_key)=1 and e.roll_key=es.roll_key)
or ((isnumeric(e.roll_key)=0 or isnumeric(es.roll_key)=0) and e.FNAME+e.LNAME=es.FNAME+es.LNAME))
where t.RESULT in ('abc','def')
and cast(t.CREATE_DATE as date) between cast(dateadd(month,-12,getdate()) as date) and cast(getdate() as date)
and (AGENT in ('lmn', 'pqr')
or ISNULL(es.VKEY,'stored value 8') in ('xx','yy','zz'))
)x
where imp_feild='abc'
and concat(x, y, z)<>''
or imp_feild='def'
GO
Expected result is that it should return a consistent number for the row count and that hopefully should solve the inconsistent values problem on the temp table.
Your query has between cast(dateadd(month,-12,getdate()) as date) and cast(getdate() as date) near the bottom. Of course the result of getdate() will be different with each execution and each call to getdate(). That will affect the result.
BTW, having * in your SELECT list is not a good idea. You should only return the columns needed. It makes the view results vulnerable to changes in the underlying tables.
There are a few other things that wouldn't pass code review where I work but that's kinda OT, I think.
This is too long for a comment. Using * in a view is a very bad idea. Not only does the view NOT update (unless you execute sp_refreshview) when you change the base table you can actually get some very interesting things happening.
Check this out as an example of just how bad this can be.
create table ViewExample (Col1 int, Col2 int)
go
create view ViewExampleView as select * from ViewExample
go
insert ViewExample select 1, 2
go
select * from ViewExampleView --obviously we get just a single column
alter table ViewExample add Col3 int --add a new column to the table, surely the view will pick this up?
go
insert ViewExample select 3, 4, 5 --insert a new row with data in all three columns
go
select * from ViewExampleView --what??? The view says select * but we only get Col1 and Col2?
alter table ViewExample drop column Col2 --Oops we decide to drop this column because we don't need it anymore
select * from ViewExampleView --What in the world? Col2 doesn't exist in the table, why is it in the view? And what the heck is going on here. The data from Col3 is now moved to Col2
drop view ViewExampleView
drop table ViewExample
Notice how in the last select from the view that the data from Col3 is being displayed in Col2. If this doesn't convince you to stop using * in views (and pretty much everywhere) I don't know what will.
I am new to SQL. I looked for all over the internet for a solution that matches the problem I have but I couldn't find any. I have a table named 'tblItemReviewItems' in an SQL server 2012.
tblItemReviewItems
Information:
1. ItemReviewId column is the PK.
2. Deleted column will have only "Yes" and "No" value.
3. Audited column will have only "Yes" and "No" value.
I want to create a stored procedure to do the followings:
Pick a random sample of 10% of all ItemReviewId for distinct 'UserId' and distinct 'ReviewDate' in a given date range. 10% sample should include- 5% of the total population from Deleted (No) and 5% of the total population from Deleted (Yes). Audited ="Yes" will be excluded from the sample.
For example – A user has 118 records. Out of the 118 records, 17 records have Deleted column value "No" and 101 records have Deleted column value "Yes". We need to pick a random sample of 12 records. Out of those 12 records, 6 should have Deleted column value "No" and 6 should have Deleted column value "Yes".
Update Audited column value to "Check" for the picked sample.
How can I achieve this?
This is the stored procedure I used to pick a sample of 5% of Deleted column value "No" and 5% of Deleted column value "Yes". Now the situation is different.
ALTER PROC [dbo].[spItemReviewQcPickSample]
(
#StartDate Datetime
,#EndDate Datetime
)
AS
BEGIN
WITH CTE
AS (SELECT ItemReviewId
,100.0
*row_number() OVER(PARTITION BY UserId
,ReviewDate
,Deleted
order by newid()
)
/count(*) OVER(PARTITION BY UserId
,Reviewdate
,Deleted
)
AS pct
FROM tblItemReviewItems
WHERE ReviewDate BETWEEN #StartDate AND #EndDate
AND Deleted in ('Yes','No')
AND Audited='No'
)
SELECT a.*
FROM tblItemReviewItems AS a
INNER JOIN cte AS b
ON b.ItemReviewId=a.ItemReviewId
AND b.pct<=6
;
WITH CTE
AS (SELECT ItemReviewId
,100.00
*row_number() OVER(PARTITION BY UserId
,ReviewDate
,Deleted
ORDER BY newid()
)
/COUNT(*) OVER(PARTITION BY UserId
,Reviewdate
,Deleted
)
AS pct
FROM tblItemReviewItems
WHERE ReviewDate BETWEEN #StartDate AND #EndDate
AND deleted IN ('Yes','No')
AND audited='No'
)
UPDATE a
SET Audited='Check'
FROM tblItemReviewItems AS a
INNER JOIN cte AS b
ON b.ItemReviewId=a.ItemReviewId
AND b.pct<=6
;
END
Any help would be highly appreciated. Thanks in advance.
This may assist you in getting started. My idea is, you create the temp tables you need, and load the specific data into the (deleted, not deleted etc.). You then run something along the lines of:
IF OBJECT_ID('tempdb..#tmpTest') IS NOT NULL DROP TABLE #tmpTest
GO
CREATE TABLE #tmpTest
(
ID INT ,
Random_Order INT
)
INSERT INTO #tmpTest
(
ID
)
SELECT 1 UNION ALL
SELECT 2 UNION ALL
SELECT 3 UNION ALL
SELECT 4 UNION ALL
SELECT 5 UNION ALL
SELECT 6 UNION ALL
SELECT 7 UNION ALL
SELECT 8 UNION ALL
SELECT 9 UNION ALL
SELECT 10 UNION ALL
SELECT 11 UNION ALL
SELECT 12 UNION ALL
SELECT 13 UNION ALL
SELECT 14 UNION ALL
SELECT 15 UNION ALL
SELECT 16;
DECLARE #intMinID INT ,
#intMaxID INT;
SELECT #intMinID = MIN(ID)
FROM #tmpTest;
SELECT #intMaxID = MAX(ID)
FROM #tmpTest;
WHILE #intMinID <= #intMaxID
BEGIN
UPDATE #tmpTest
SET Random_Order = 10 + CONVERT(INT, (30-10+1)*RAND())
WHERE ID = #intMinID;
SELECT #intMinID = #intMinID + 1;
END
SELECT TOP 5 *
FROM #tmpTest
ORDER BY Random_Order;
This assigns a random number to a column, that you then use in conjunction with a TOP 5 clause, to get a random top 5 selection.
Appreciate a loop may not be efficient, but you may be able to update to a random number without it, and the same principle could be implemented. Hope that gives you some ideas.
I am trying to set up a query that will return all of the records for a group in a table until a record value in that table equals a certain value.
I am currently selecting the top 2 records for each group in the table with a sub query however that doesn't work out if the event I need to record falls outside of the top 2. I thought about increasing the sub query to a top 3 however then that returns to much data if the event in question occurs in the top 2.
For example if I have
Name Date Event
Tom 5/5 Test
Tom 5/5 Test
Tom 5/5 Stop Test
Tom 5/5 Test
Tom 5/5 Test
Gary 5/5 Test
Gary 5/5 Stop Test
Gary 5/5 Test
I would need to return the first 3 records for Tom and the first 2 records for gary. Is there an easy way to do this within Access / SQL?
SqlFiddle doesn't seem to be working for MSSQL at the moment.
Here's something that should get you on the right path. I'm assuming that the date in your example also implies a time and therefore an ordering of events. Given that, the SQL below will generate a row number based on the datetime and "grouped" by the name. The query against the PartialResult CTE will return the rows where the generated row number are <= the first occurrence of the "Stop Test" event for each name.
BEGIN TRANSACTION
CREATE TABLE [NameDateEvent]
(
[Name] [NVARCHAR](100) NOT NULL,
[Date] DATETIME NOT NULL,
[Event] [NVARCHAR](100) NOT NULL,
)
GO
INSERT INTO [NameDateEvent]
VALUES
('Tom','2016-02-26 14:55:38.517', 'Test')
,('Tom','2016-02-26 14:55:39.517', 'Test')
,('Tom','2016-02-26 14:55:40.517', 'Stop Test')
,('Tom','2016-02-26 14:55:41.517', 'Test')
,('Tom','2016-02-26 14:55:42.517', 'Test')
,('Gary','2016-02-26 14:55:43.517', 'Test')
,('Gary','2016-02-26 14:55:44.517', 'Stop Test')
,('Gary','2016-02-26 14:55:45.517', 'Test')
GO
;WITH PartialResult AS
(
SELECT *, ROW_NUMBER() OVER (PARTITION BY [Name] ORDER BY [Date]) AS [RowNumByName]
FROM [NameDateEvent]
)
SELECT *
FROM PartialResult pr
WHERE pr.[RowNumByName] <= (SELECT MIN([RowNumByName]) FROM PartialResult prr WHERE prr.Name = pr.Name AND prr.Event = 'Stop Test')
ROLLBACK