Using SQL Server 2000
table1
id date value
001 23/03/2012 P
001 24/03/2012 A
001 25/03/2012 P
001 26/03/2012 P
....
I want to check previous row and next row value by date wise, if it is P, then i want to make a current row P
expected output
id date value
001 23/03/2012 P
001 24/03/2012 P 'Updated as per the condition
001 25/03/2012 P
001 26/03/2012 P
....
How to make a query for the above condition
Need Query Help
Have a look at the example script below.
DECLARE #Table TABLE(
ID VARCHAR(20),
[Date] DATETIME,
Value VARCHAR(10)
)
INSERT INTO #Table SELECT '001','23/Mar/2012','P'
INSERT INTO #Table SELECT '001','24/Mar/2012','A'
INSERT INTO #Table SELECT '001','25/Mar/2012','P'
INSERT INTO #Table SELECT '001','26/Mar/2012','P'
SELECT *
FROM #Table
UPDATE #Table
SET Value = 'P'
FROM #Table t
WHERE t.Value = 'A'
AND
(
SELECT TOP 1
Value
FROM #Table tBelow
WHERE t.ID = tBelow.ID
AND t.Date > tBelow.Date
ORDER BY tBelow.Date DESC
) = 'P' --Previous
AND (
SELECT TOP 1
Value
FROM #Table tBelow
WHERE t.ID = tBelow.ID
AND t.Date < tBelow.Date
ORDER BY tBelow.Date
) = 'P' --Next
SELECT *
FROM #Table
-- Input parameters
declare #cur_id char(3)
declare #cur_dt datetime
set #cur_id = '001'
set #cur_dt = '2012-03-25'
-- Search previous/next row
declare #prev_dt datetime
declare #next_dt datetime
select #prev_dt = max(date)
from YourTable
where id = #cur_id
and date < #cur_dt
and value = 'A'
select #next_dt = min(date)
from YourTable
where id = #cur_id
and date > #cur_dt
and value = 'A'
-- Update previous/next row if found
update YourTable
set value = 'P'
where id = '001'
and date in (#prev_dt, #next_dt)
Related
There are two tables, T1 includes start date column and T2 includes end date column. Both the columns have both date and time.
T1 has all the rows unique while T2 can have multiple rows for same id and in all the row the end date column might be different (each row with different date and time).
I want to calculate the difference (no. of days) between End date and the start date while keeping in mind that we have to only pick the last date which is lying in the End date column.
;WITH MaxEndDate AS
(
SELECT
T2.PrimaryKey,
MaxEndDate = MAX(EndDate)
FROM
T2
GROUP BY
T2.PrimaryKey
)
SELECT
T1.PrimaryKey,
T1.StartDate,
M.MaxEndDate,
AmountDays = DATEDIFF(DAY, T1.StartDate, M.MaxEndDate)
FROM
T1
INNER JOIN MaxEndDate AS M ON T1.PrimaryKey = M.PrimaryKey
I would recommend creating a temporary table using T2 something like
Select Distinct ID
,MAX(ENDDATE) As [ENDDATE]
INTO #TMPTABLE1
then you include this into T1
Select A.ID
,Startdate
,B.ENDDATE
,Datediff(day,A.STARTDATE,B.ENDDATE) as DAYS
From T1 as A inner join
#TEMPTABLE1 as B on A.ID = B.ID
--------get no of days among multiple dates----------
DECLARE #i INT , #numrows INT , #days INT , #Fdate DATETIME , #Tdate DATETIME;
SET
#days = 0;
DECLARE #employee_table TABLE ( idx SMALLINT PRIMARY KEY IDENTITY(1,
1) ,
EmpId INT ,
SinceDate DATETIME ,
TillDate DATETIME );
-- populate employee table INSERT #employee_table
SELECT
EmpId ,
SinceDate ,
TillDate
FROM
T_EmpPosting_PIS
WHERE
EmpId = 18
AND OfficeTypeID = 1
ORDER BY
TransDate;
--SELECT
*
FROM
#employee_table -- enumerate the table
SET
#i = 1;
SET
#numrows = ( SELECT
COUNT(*)
FROM
#employee_table );
IF #numrows > 0 WHILE ( #i <= ( SELECT
MAX(idx)
FROM
#employee_table ) ) BEGIN
SET
#Fdate = ( SELECT
SinceDate
FROM
#employee_table
WHERE
idx = #i );
IF ( #i = #numrows ) BEGIN
SET
#Tdate = GETDATE();
END;
ELSE BEGIN
SET
#Tdate = ( SELECT
TillDate
FROM
#employee_table
WHERE
idx = #i );
END;
SET
#days = ( SELECT
DATEDIFF(DAY,
#Fdate,
#Tdate) ) #days;
SET
#i = #i 1;
END;
SELECT
#days;
I am using SQl Server 2014. I have the following T-SQL query (with its corresponding output given below):
USE mydatabase
declare #t table (StayID int)
insert into #t select distinct StayID from DateOfBirth
while ((select count(1) from #t) > 0)
begin
declare #Id int = (select top 1 StayID from #t)
declare #age_tab table (StayID int, Age int, Year1 date)
declare #cage1 smallint = 2, #cage2 smallint = 5
declare #i_a int = (select AdultCount from DateOfBirth where StayID = #Id)
declare #i_c1 int = (select [0-3] from DateOfBirth where StayID = #Id)
declare #i_c2 int = (select [4-6] from DateOfBirth where StayID = #Id)
declare #age int = (select Age from DateOfBirth where StayID = #Id)
declare #Year1 date = (select cast(datepart(year,ArrivalDate) as varchar) from DateOfBirth where StayID = #Id)
while (#i_a>1)
begin
insert into #age_tab select #Id, (#age + 2), #Year1
set #age-=2
set #i_a-=1
end
while (#i_c1>0)
begin
insert into #age_tab select #Id, #cage1, #Year1
set #i_c1-=1
end
while (#i_c2>0)
begin
insert into #age_tab select #Id, #cage2, #Year1
set #i_c2-=1
end
insert into #age_tab select StayID, Age, cast(datepart(year,ArrivalDate) as varchar) from DateOfBirth where StayID = #Id
delete #t where StayID = #Id
end
select * from #age_tab
order by StayID, Age desc
The output of the above query is as follows:
StayID Age Year1
101 54 2016-01-01
101 52 2016-01-01
102 42 2016-01-01
102 40 2016-01-01
102 14 2016-01-01
...
I want to join the output of this query with values from another table in my database. Given the above query uses temporary tables to perform its operation, I am unable to wrap it into a CTE.
The additional information I want to bring to my output is stored in, say, table "t2".
Let's say the output from the query above is temporarily stored in a table called "t1"
So, I want to do something like this:
Select a.*
, b.Cty
from t1 a
LEFT JOIN t2 b on b.StayID = a.StayID
How can I do this?
I need to populate a new column in a table known as RowType, where if the ID column contains the same ID value as the one above RowType is populated with 'D', if the value is new then RowType is populate with 'H', how would the SQL code look to be able to do this?
I.e should look something like below:
RowType (to be populated), ID (already there)
H, 1
D, 1
D, 1
H, 2
D, 2
H, 3
D, 3
D, 3
Thanks
You can use Row_Number and case
select *, RowType = case when Row_Number() over (partition by id order by id) = 1 then 'H' else 'D' End from #yourid
Your input table:
create table #yourId (id int)
insert into #yourid (id) values
(1)
,(1)
,(1)
,(2)
,(2)
,(3)
,(3)
,(3)
Use ROW_NUMER concept :
CREATE TABLE #table(Id INT)
INSERT INTO #table(Id)
SELECT 1 UNION ALL
SELECT 1 UNION ALL
SELECT 1 UNION ALL
SELECT 2 UNION ALL
SELECT 2 UNION ALL
SELECT 3 UNION ALL
SELECT 3 UNION ALL
SELECT 3
SELECT CASE WHEN RowType = 1 THEN 'H' ELSE 'D' END RowType , Id
FROM
(
SELECT ROW_NUMBER() OVER (PARTITION BY Id ORDER BY id) RowType , Id
FROM #table
) A
Please try...
UPDATE tableName
SET RowType = CASE
WHEN ( ID = LAG( ID ) OVER ( ORDER BY ID ) ) THEN 'D'
ELSE 'H'
END
If you have any questions or comments, then please feel free to post a Comment accordingly.
Further Reading
https://learn.microsoft.com/en-us/sql/t-sql/functions/lag-transact-sql (for information on LAG()).
It may not be the best solution, however it can point you somewhere, and it works.
Go through the code carfuly and make sure you understand this.
create table yourTable (RowType char, id int)
insert into yourTable (RowType, id) values
('',1)
,('',1)
,('',1)
,('',2)
,('',2)
,('',3)
,('',3)
,('',3)
select
row_number() over (order by id) as rowNumber,
RowType,
id
into #tempTable
from yourTable
declare #maxRow int = (select max(rowNumber) from #tempTable)
declare #currentRow int = 1
while (#currentRow <= #maxRow)
begin
if (#currentRow = 1)
begin
update #tempTable
set RowType = 'H'
where rowNumber = #currentRow
end
else
begin
if (select id from #tempTable where rowNumber = #currentRow) = (select id from #tempTable where rowNumber = #currentRow - 1)
begin
update #tempTable
set RowType = 'D'
where rowNumber = #currentRow
end
else
begin
update #tempTable
set RowType = 'H'
where rowNumber = #currentRow
end
end
set #currentRow = #currentRow +1
end
-- update data in actual table, you can do below if only those two columns exist in table !!!
delete from yourTable
-- insert into table from updated temp table
insert into yourTable
select RowType, ID
from #tempTable
select * from yourTable
select * from #tempTable
-- drop temp table
drop table #tempTable
I need to update a column (type of datetime) in the top 1000 rows my table. However the catch is with each additional row I must increment the GETDATE() by 1 second... something like DATEADD(ss,1,GETDATE())
The only way I know how to do this is something like this:
UPDATE tablename
SET columnname = CASE id
WHEN 1 THEN DATEADD(ss,1,GETDATE())
WHEN 2 THEN DATEADD(ss,2,GETDATE())
...
END
Obviously this is not plausible. Any ideas?
How about using id rather than a constant?
UPDATE tablename
SET columnname = DATEADD(second, id, GETDATE() )
WHERE id <= 1000;
If you want the first 1000 rows (by id), but the id has gaps or other problems, then you can use a CTE:
with toupdate as (
select t.*, row_number() over (order by id) as seqnum
from tablename
)
update toupdate
set columnname = dateadd(second, seqnum, getdate())
where seqnum <= 1000;
I don't know what your ID is like, and I'm assuming you have at least SQL Server 2008 or else ROW_NUMBER() won't work.
Note: I did top 2 to show you that you that the top works. You can change it to top 1000 for your actual query.
DECLARE #table TABLE (ID int, columnName DATETIME);
INSERT INTO #table(ID)
VALUES(1),(2),(3);
UPDATE #table
SET columnName = DATEADD(SECOND,B.row_num,GETDATE())
FROM #table A
INNER JOIN
(
SELECT TOP 2 *, ROW_NUMBER() OVER (ORDER BY ID) row_num
FROM #table
ORDER BY ID
) B
ON A.ID = B.ID
SELECT *
FROM #table
Results:
ID columnName
----------- -----------------------
1 2015-03-31 13:11:59.760
2 2015-03-31 13:12:00.760
3 NULL
You don't make explicit the SQL Server version you're using, so I will assume SQL Server 2005 or above. I believe the WAITFOR DELAY command would be a good option to keep adding 1 second to each rows of the datetime column.
See this example:
-- Create temp table
CREATE TABLE #Client
(
RecordID int identity(1,1),
[Name] nvarchar(100) not null,
PurchaseDate datetime null
)
-- Fill in temp table with example values
INSERT INTO #Client
VALUES ( 'Jhon', NULL)
INSERT INTO #Client
VALUES ( 'Martha', NULL)
INSERT INTO #Client
VALUES ( 'Jimmy', NULL)
-- Create local variables
DECLARE #currentRecordId int,
#currentName nvarchar(100)
-- Create cursor
DECLARE ClientsCursor CURSOR FOR
SELECT RecordID,
[Name]
FROM #Client
OPEN ClientsCursor
FETCH FROM ClientsCursor INTO #currentRecordId, #currentName
-- Check ##FETCH_STATUS to see if there are any more rows to fetch.
WHILE ##FETCH_STATUS = 0
BEGIN
UPDATE #Client
SET PurchaseDate = DATEADD(ss,1,GETDATE())
WHERE RecordID = #currentRecordId
AND [Name] = #currentName
WAITFOR DELAY '00:00:01.000'
FETCH NEXT FROM ClientsCursor INTO #currentRecordId, #currentName
END
CLOSE ClientsCursor;
DEALLOCATE ClientsCursor;
SELECT *
FROM #Client
And here's the result:
1 Jhon 2015-03-31 15:20:04.477
2 Martha 2015-03-31 15:20:05.473
3 Jimmy 2015-03-31 15:20:06.470
Hope you find this answer helpful
This should be what you need (at least a guidline)
DELIMITER $$
CREATE PROCEDURE ADDTIME()
BEGIN
DECLARE i INT Default 1 ;
simple_loop: LOOP
UPDATE tablename SET columnname = DATE_ADD(NOW(), INTERVAL i SECOND) where rownumber = i
SET i=i+1;
IF i=1001 THEN
LEAVE simple_loop;
END IF;
END LOOP simple_loop;
END $$
To call that stored procedure use
CALL ADDTIME()
Let say I have a table:
ColumnA ColumnB
---------------------------------
1 10.75
4 1234.30
6 2000.99
How can I write a SELECT query that will result in the following:
ColumnA ColumnB
---------------------------------
1 10.75
2 0.00
3 0.00
4 1234.30
5 0.00
6 2000.99
You can use a CTE to create a list of numbers from 1 to the maximum value in your table:
; with numbers as
(
select max(ColumnA) as nr
from YourTable
union all
select nr - 1
from numbers
where nr > 1
)
select nr.nr as ColumnA
, yt.ColumnB
from numbers nr
left join
YourTable yt
on nr.nr = yt.ColumnA
order by
nr.nr
option (maxrecursion 0)
See it working at SQL Fiddle.
Please try:
declare #min int, #max int
select #min=MIN(ColumnA), #max=MAX(ColumnA) from tbl
select
distinct number ColumnA,
isnull(b.ColumnB, 0) ColumnB
from
master.dbo.spt_values a left join tbl b on a.number=b.ColumnA
where number between #min and #max
Create a TallyTable (or NumbersTable) - see this question: What is the best way to create and populate a numbers table?
With that table create an insert statement:
INSERT INTO YourTable (ColumnA, ColumnB)
SELECT Number FROM NumberTable
WHERE
NOT EXISTS (SELECT 1 FROM YourTable WHERE NumberTable.Number = YourTable.ColumnA)
-- Adjust this value or calculate it with a query to the maximum of the source table
AND NumberTable.Number < 230130
DECLARE #t TABLE (ID INT,Val DECIMAL(10,2))
INSERT INTO #t (ID,Val) VALUES (1,10.75)
INSERT INTO #t (ID,Val) VALUES (4,6.75)
INSERT INTO #t (ID,Val) VALUES (7,4.75)
declare #MinNo int
declare #MaxNo int
declare #IncrementStep int
set #MinNo = 1
set #MaxNo = 10
set #IncrementStep = 1
;with C as
(
select #MinNo as Num
union all
select Num + #IncrementStep
from C
where Num < #MaxNo
)
select Num,
CASE WHEN Val IS NOT NULL THEN Val ELSE 0.00 END AS NUMBER
from C
LEFT JOIN #t t
ON t.ID = c.Num
You could use a number-table or following trick to generate a sequence which you can LEFT OUTER JOIN with your table. I assume you want to determine the boundaries dynamically:
WITH Seq AS
(
SELECT TOP ((SELECT Max(ColumnA)FROM Table1) - (SELECT Min(ColumnA) FROM Table1) + 1)
Num = (SELECT Min(ColumnA) FROM Table1)+ Row_number() OVER (ORDER BY [object_id]) -1
FROM sys.all_objects)
SELECT ColumnA = Seq.Num,
ColumnB = COALESCE(t.ColumnB ,0.00)
FROM Seq
LEFT OUTER JOIN Table1 t
ON Seq.Num = t.ColumnA
Demo with your sample.
Worth reading: http://www.sqlperformance.com/2013/01/t-sql-queries/generate-a-set-1
I have my collect of table functions like these.
create function dbo.GetNumbers(#Start int, #End int)
returns #Items table
(
Item int
)
as
begin
while (#Start <= #End)
begin
insert into #Items
values (#Start)
set #Start = #Start + 1
end
return
end
Then I can use it to left join to my data table and every value will be there.
declare #min int, #max int
set #min = 10
set #max = 20
select gn.Item
from dbo.GetNumbers(#min, #max) gn
I have similar table functions for date ranges, times, timezones, etc.