declare #q table (A int);
declare #a table (B int);
insert into #q select 1 union select 2 union select 3;
insert into #a select 0 union select 1 union select 2 union select 3 union select 4;
I want to know if the data of #q's column A is a subset of #a's column B.
This produces an error.
if (select A from #q) in (select B from #a)
print 'yes' else print 'no';
This works, but is it the best way of finding out?
if (select count(*) from #q) = (select count(*) from #q inner join #a on A = B)
print 'yes' else print 'no';
Or is there a better way?
Try using EXCEPT.
SELECT ColumnA
FROM TableA
EXCEPT
SELECT ColumnB
FROM TableB
It will give you a list of everything that's in A that's not in B.
You can insert the result from the above into a table variable, and then check its COUNT (0 = subset, anything else is not subset).
Try following. This basically looks for anything that is in #q but not in #a and gets its count. If the count is more than 0 then it returns No otherwise Yes.
SELECT CASE
WHEN COUNT(*) > 0 THEN 'No'
ELSE 'Yes'
END
FROM #q q
LEFT JOIN #a a
ON q.A = a.B
WHERE a.B iS NULL
Hope it helps.
Related
I am trying to convert a sql if exists statement into a SSRS valid format to run a report on CRM.
CRM report doesn't accept the report on upload if I have a if exists method, I'm having troubles figuring out what I can use in its place.
IF EXISTS(select * from dbo.FC where dbo.FC.ContactID in (select dbo.AV.so_contactid from dbo.AV))
begin
select [STATEMENT 1]
from dbo.AV CRMAF_so_AV join
dbo.FC c
on CRMAF_so_AV.so_contactid = c.ContactID;
end
else
begin
select [STATEMENT 2]
from dbo.AV CRMAF_so_AV join
dbo.FA c
on CRMAF_so_AV.so_contactid = c.AccountID;
end;
I want to be able to either run the select [STATEMENT 1] if the condition is true else I want to run select [STATEMENT 2]
I have managed to get this to work by doing a LEFT JOIN instead of a JOIN.
select [STATEMENT 1 + 2 all columns needed]
from dbo.AV CRMAF_so_AV
left join dbo.FC c on CRMAF_so_AV.so_contactid = c.ContactID;
left join dbo.FA a on CRMAF_so_AV.so_contactid = a.AccountID;
This now runs if its an account or a contact.
Try this -
You have to put your entire statement in #select1 and #select1.
declare #statement1 as varchar(max);
declare #statement2 as varchar(max);
SET #statement1 = 'SELECT 1'
SET #statement2 = 'SELECT 2'
IF EXISTS(select * from dbo.FC where dbo.FC.ContactID in (select dbo.AV.so_contactid from dbo.AV))
BEGIN
EXEC (#statement1)
END
ELSE
BEGIN
EXEC (#statement2)
END
Instead of using if exists can you not get a count of records that meet the criteria and then if its 1 or greater run a different query as apposed to if it was equal to 0.
let me know if I am missing something what you are trying to achieve.
sorry i am unable to put comments due to having a new account so my reputation is low.
I think you need something like this:
WITH PreSelection AS (
SELECT
AV.ID AS AVID,
(SELECT TOP(1) c.ContactID FROM dbo.FC c WHERE c.ContactID = AV.so_contactid) AS ContactID,
(SELECT TOP(1) c.ContactID FROM dbo.FA c WHERE c.AccountID = AV.so_contactid) AS AccountID
FROM dbo.AV
)
SELECT
AVID,
ISNULL(
CASE WHEN ContactID IS NULL
THEN (SELECT TOP(1) AccountName FROM dbo.FA WHERE FA.AccountID = AccountID)
ELSE (SELECT TOP(1) LTRIM(RTRIM(ISNULL(FirstName, '') + ' ' + ISNULL(LastName, ''))) FROM dbo.FC WHERE FC.ContactID = ContactID)
END, '') AS ContactName
FROM PreSelection
A few things to note:
When SSRS evaluates query it expects the resluts to always have the same structure in terms of column names and types.
So you CANNOT do something like this..
IF #x=#y
BEGIN
SELECT Name, Age FROM employees
END
ELSE
BEGIN
SELECT DeptID, DeptName, DeptEMpCOunt FROM departments
END
... as this will return different types and column names and column counts.
What you CAN DO is this..
DECLARE #t TABLE(resultType int, colA varchar(128), colB int, colC varchar(128), colD int)
IF #x=#y
BEGIN
INSERT INTO #t(resultType, colA, ColB)
SELECT 1 as resultType, Name, Age FROM employees
END
ELSE
BEGIN
INSERT INTO #t(resultType, colB, colC, colD)
SELECT 2 AS resultType, DeptID, DeptName, DeptEmpCount FROM departments
END
SELECT * FROM #t
Al we are doing is creating a table that can handle all variations of the data and putting the results into whatever columns can accommodate that data type.
This will always return the same data structure so SSRS will be happy, then you will need to handle which columns to display your data from based on what gets returned, hence why I added the result type to the results so you can test that from within the report.
TABLEA
MasterCategoryID MasterCategoryDesc
1 Housing
1 Housing
1 Housing
2 Car
2 Car
2 Car
3 Shop
TABLEB
ID Description
1 Home
2 Home
3 Plane
4 Car
INSERT into TableA
(
[MasterCategoryID]
[MasterCategoryDesc]
)
Select
case when (Description) not in (select MasterCategoryDesc from TableA)
then (select max(MasterCategoryID)+1 from TableA)
else (select top 1 MasterCategoryID from TableA where MasterCategoryDesc = Description)
end as [MasterCategoryID]
,Description as MasterCategoryDesc
from TableB
I want to enter rows using SQL/Stored Procedure from tableB to tableA. for example when inserting first row 'Home' it does not exist in MastercategoryDesc therefore will insert '4' in MasterCategoryID. Second row should keep the '4' again in MasterCategoryID.
The code below does it however after the first row the MastercategoryID remains the same for all rows. I Dont know how to keep track of ids while inserting the new rows.
p.s. Pls do not reply by saying i need to use IDENTITY() index. I have to keep the table structure the same and cannot change it. thanks
Create a new table your_table with fields x_MasterCategoryDesc ,x_SubCategoryDesc
Insert all your values in that table and the run the below SP.
CREATE PROCEDURE x_experiment
AS
BEGIN
IF object_id('TEMPDB..#TABLES') IS NOT NULL
BEGIN
DROP TABLE #TABLES
END
DECLARE #ROWCOUNT INT
DECLARE #ROWINDEX INT =0,
#MasterCategoryDesc VARCHAR(256),
#SubCategoryDesc VARCHAR(256)
select IDENTITY(int,1,1) as ROWID,*
into #TABLES
From your_table
SELECT #ROWCOUNT=COUNT(*) from #TABLES --where ROWID between 51 and 100
WHILE (#ROWINDEX<#ROWCOUNT)
BEGIN
set #ROWINDEX=#ROWINDEX+1
Select
#MasterCategoryDesc=x_MasterCategoryDesc,
#SubCategoryDesc=x_SubCategoryDesc
from #TABLES t
where rowid = #ROWINDEX
INSERT into Table1
([MasterCategoryID], [MasterCategoryDesc], [SubCategoryDesc], [SubCategoryID])
select TOP 1
case when #MasterCategoryDesc not in (select [MasterCategoryDesc] from Table1)
then (select max([MasterCategoryID])+1 from Table1)
else (select distinct max([MasterCategoryID]) from Table1
where [MasterCategoryDesc]=#MasterCategoryDesc
group by [MasterCategoryID])
end as [MasterCategoryID]
,#MasterCategoryDesc as [MasterCategoryDesc]
,#SubCategoryDesc as [SubCategoryDesc]
,case when #SubCategoryDesc not in (select [SubCategoryDesc] from Table1)
then (select max([SubCategoryID])+1 from Table1 )
else (select max([SubCategoryID]) from Table1
where [SubCategoryDesc]=#SubCategoryDesc
group by [SubCategoryID])
end as [SubCategoryID]
from Table1
END
select * from Table1 order by MasterCategoryID
END
GO
exec x_experiment --SP Execute
SQL FIDDLE
Use a CURSOR to do the work. The cursor loops through each row of TableA and the MasterCategoryID increases if it is not found in TableB. This happens before the next row of TableA is loaded into the cursor ...
DECLARE #ID int
DECLARE #Description VARCHAR(MAX)
DECLARE my_cursor CURSOR FOR
SELECT ID, Description FROM TableB
OPEN my_cursor
FETCH NEXT FROM my_cursor
INTO #ID, #Description
WHILE ##FETCH_STATUS = 0
BEGIN
INSERT into TableA(MasterCategoryID, MasterCategoryDesc)
SELECT CASE WHEN #Description NOT IN (SELECT MasterCategoryDesc FROM TableA)
THEN (SELECT MAX(MasterCategoryID)+1 FROM TableA)
ELSE (SELECT TOP 1 MasterCategoryID
FROM TableA
WHERE MasterCategoryDesc = #Description)
END AS MasterCategoryID, Description as MasterCategoryDesc
FROM TableB
WHERE ID = #ID
FETCH NEXT FROM my_cursor
INTO #ID, #Description
END
Your data structure leaves something to be desired. You shouldn't have a master id column that has repeated values.
But you can still do what you want:
INSERT into TableA ([MasterCategoryID], [MasterCategoryDesc])
Select coalesce(a.MasterCategoryId,
amax.maxid + row_number() over (partition by (a.MasterCategoryId) order by b.id)
),
coalesce(a.MasterCategoryDesc, b.desc)
from TableB b left outer join
(select desc, max(MasterCaegoryId) as maxid
from TableA a
group by desc
) a
on b.desc = a.desc left outer join
(select max(MasterCategoryID) as maxid
from TableA
) amax
The idea is to take the information from the master table when it is available. When not available, then MasterCategoryId will be NULL. A new id is calculated, using row_number() to generate sequential numbers. These are then added to the previous maximum id.
Is it possible to run another SELECT based on the result of the first SELECT?
For example:
SELECT COUNT(*) FROM table1
If the result is 0, I want to display the result of:
SELECT A, B, C FROM table2
If the result of the first SELECT is NOT 0, display the result of the first query and IGNORE the second.
You can certainly run a second select based on the results of the first:
You could do this:
declare #count integer = (select count(*) from table1)
if #count = 0
select ... from table1
else
select ... from table2
shouldn't need a variable for your problem
if EXISTS (select * from table1)
select A, B, C from table2
The result of the first query is the count, so you can use the variable to avoid re-running the query.
DECLARE #count int = ( SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS )
IF #count > 0
BEGIN
SELECT TABLE_NAME, COLUMN_NAME, ORDINAL_POSITION FROM INFORMATION_SCHEMA.COLUMNS
END
ELSE
BEGIN
SELECT #count AS total
END
I have more than 3 sql tables.
now i'm trying to select count(*) from all tables but how can i do this?.
I want to know whether data is present in all tables or not
I need to check the row count from previous business day ~15% for any table and it sends an email alert
I tried like following please help me to complete
PROCEDURE [dbo].[SendEmail_WSOTableDataAlert]
AS
BEGIN
declare #err int
IF NOT EXISTS (select 1 from T1) OR
NOT EXISTS (select 1 from T2)
BEGIN
set #error=1
END
//here i need to show which table is having empty data how can i do this please help
SET #tableHTML = #tableHTML + +
'</TABLE>' + #EmailFooter;
#error =1
then
send mail
END
Select
case when count(*) = 0 then
'No rows'
else
'Has rows'
end
FROM
(
Select * from #table1
UNION ALL
Select * from #table2
UNION ALL
Select * from #table3
) t
UPDATE
This makes sure all of then have at least one row and fail if any of them does not have record
Select
case when count(*) = 0 then
'No rows'
else
'Has rows'
end
FROM
(
Select top 1 1 found from #table1
intersect
Select top 1 1 found from #table2
intersect
Select top 1 1 found from #table3
) t
You can try multiplying the flags indicating zero counts together. If any of them is zero, the result will be zero.
select (case when (select count(*) from table1)=0 then 0 else 1 end
*case when (select count(*) from table2)=0 then 0 else 1 end
*case when (select count(*) from table3)=0 then 0 else 1 end) as no_zeros
If you would like to know which table has all zeros, you could transform the query as follows:
select (case when (select count(*) from table1)=0 then 1 else 0 end
+case when (select count(*) from table2)=0 then 2 else 0 end
+case when (select count(*) from table3)=0 then 4 else 0 end
+case when (select count(*) from table4)=0 then 8 else 0 end) as no_zeros
Use powers of two (1, 2, 4, 8, 16, 32, and so on) as your flags. Ones 1 in the binary representation of the result will tell you which tables have no records.
(select count() from table1 )
union all
(select count() from table2 )
union all
(select count(*) from table3 )
And then loop through the rows of the result
declare #count1 int
select #count1 = count(*)
from table1
declare #count2 int
select #count2 = count(*)
from table2
declare #count3 int
select #count3 = count(*)
from table3
if (#count1 + #count2 + #count3 = 0)
--do something
else
--do something else
You can use the EXISTS keyword to efficiently check if there is any data in a table.
IF NOT EXISTS (SELECT 1 FROM Table1) OR NOT EXISTS (SELECT 1 FROM Table2) OR NOT EXISTS (SELECT 1 FROM Table3)
BEGIN
/* do something */
END
I have the following table layout. Each line value will always be unique. There will never be more than one instance of the same Id, Name, and Line.
Id Name Line
1 A Z
2 B Y
3 C X
3 C W
4 D W
I would like to query the data so that the Line field becomes a column. If the value exists, a 1 is applied in the field data, otherwise a 0. e.g.
Id Name Z Y X W
1 A 1 0 0 0
2 B 0 1 0 0
3 C 0 0 1 1
4 D 0 0 0 1
The field names W, X, Y, Z are just examples of field values, so I can't apply an operator to explicitly check, for example, 'X', 'Y', or 'Z'. These could change at any time and are not restricted to a finate set of values. The column names in the result-set should reflect the unique field values as columns.
Any idea how I can accomplish this?
It's a standard pivot query.
If 1 represents a boolean indicator - use:
SELECT t.id,
t.name,
MAX(CASE WHEN t.line = 'Z' THEN 1 ELSE 0 END) AS Z,
MAX(CASE WHEN t.line = 'Y' THEN 1 ELSE 0 END) AS Y,
MAX(CASE WHEN t.line = 'X' THEN 1 ELSE 0 END) AS X,
MAX(CASE WHEN t.line = 'W' THEN 1 ELSE 0 END) AS W
FROM TABLE t
GROUP BY t.id, t.name
If 1 represents the number of records with that value for the group, use:
SELECT t.id,
t.name,
SUM(CASE WHEN t.line = 'Z' THEN 1 ELSE 0 END) AS Z,
SUM(CASE WHEN t.line = 'Y' THEN 1 ELSE 0 END) AS Y,
SUM(CASE WHEN t.line = 'X' THEN 1 ELSE 0 END) AS X,
SUM(CASE WHEN t.line = 'W' THEN 1 ELSE 0 END) AS W
FROM TABLE t
GROUP BY t.id, t.name
Edited following update in question
SQL Server does not support dynamic pivoting.
To do this you could either use dynamic SQL to generate a query along the following lines.
SELECT
Id ,Name,
ISNULL(MAX(CASE WHEN Line='Z' THEN 1 END),0) AS Z,
ISNULL(MAX(CASE WHEN Line='Y' THEN 1 END),0) AS Y,
ISNULL(MAX(CASE WHEN Line='X' THEN 1 END),0) AS X,
ISNULL(MAX(CASE WHEN Line='W' THEN 1 END),0) AS W
FROM T
GROUP BY Id ,Name
Or an alternative which I have read about but not actually tried is to leverage the Access Transform function by setting up an Access database with a linked table pointing at the SQL Server table then query the Access database from SQL Server!
Here is the dynamic version
Test table
create table #test(id int,name char(1),line char(1))
insert #test values(1 , 'A','Z')
insert #test values(2 , 'B','Y')
insert #test values(3 , 'C','X')
insert #test values(4 , 'C','W')
insert #test values(5 , 'D','W')
insert #test values(5 , 'D','W')
insert #test values(5 , 'D','P')
Now run this
declare #names nvarchar(4000)
SELECT #names =''
SELECT #names = #names + line +', '
FROM (SELECT distinct line from #test) x
SELECT #names = LEFT(#names,(LEN(#names) -1))
exec('
SELECT *
FROM(
SELECT DISTINCT Id, Name,Line
FROM #test
) AS pivTemp
PIVOT
( COUNT(Line)
FOR Line IN (' + #names +' )
) AS pivTable ')
Now add one row to the table and run the query above again and you will see the B
insert #test values(5 , 'D','B')
Caution: Of course all the problems with dynamic SQL apply, if you can use sp_executeSQL but since parameters are not use like that in the query there really is no point
Assuming you have a finite number of values for Line that you could enumerate:
declare #MyTable table (
Id int,
Name char(1),
Line char(1)
)
insert into #MyTable
(Id, Name, Line)
select 1,'A','Z'
union all
select 2,'B','Y'
union all
select 3,'C','X'
union all
select 3,'C','W'
union all
select 4,'D','W'
SELECT Id, Name, Z, Y, X, W
FROM (SELECT Id, Name, Line
FROM #MyTable) up
PIVOT (count(Line) FOR Line IN (Z, Y, X, W)) AS pvt
ORDER BY Id
As you are using SQL Server, you could possibly use the PIVOT operator intended for this purpose.
If you're doing this for a SQL Server Reporting Services (SSRS) report, or could possibly switch to using one, then stop now and go throw a Matrix control onto your report. Poof! You're done! Happy as a clam with your data pivoted.
Here's a rather exotic approach (using sample data from the old Northwind database). It's adapted from the version here, which no longer worked due to the deprecation of DBCC RENAMECOLUMN and the addition of PIVOT as a keyword.
set nocount on
create table Sales (
AccountCode char(5),
Category varchar(10),
Amount decimal(8,2)
)
--Populate table with sample data
insert into Sales
select customerID, 'Emp'+CAST(EmployeeID as char), sum(Freight)
from Northwind.dbo.orders
group by customerID, EmployeeID
create unique clustered index Sales_AC_C
on Sales(AccountCode,Category)
--Create table to hold data column names and positions
select A.Category,
count(distinct B.Category) AS Position
into #columns
from Sales A join Sales B
on A.Category >= B.Category
group by A.Category
create unique clustered index #columns_P on #columns(Position)
create unique index #columns_C on #columns(Category)
--Generate first column of Pivot table
select distinct AccountCode into Pivoted from Sales
--Find number of data columns to be added to Pivoted table
declare #datacols int
select #datacols = max(Position) from #columns
--Add data columns one by one in the correct order
declare #i int
set #i = 0
while #i < #datacols begin
set #i = #i + 1
--Add next data column to Pivoted table
select P.*, isnull((
select Amount
from Sales S join #columns C
on C.Position = #i
and C.Category = S.Category
where P.AccountCode = S.AccountCode),0) AS X
into PivotedAugmented
from Pivoted P
--Name new data column correctly
declare #c sysname
select #c = Category
from #columns
where Position = #i
exec sp_rename '[dbo].[PivotedAugmented].[X]', #c, 'COLUMN'
--Replace Pivoted table with new table
drop table Pivoted
select * into Pivoted from PivotedAugmented
drop table PivotedAugmented
end
select * from Pivoted
go
drop table Pivoted
drop table #columns
drop table Sales