I am working on a stored procedure that will have a pretty big WHERE clause. In an effort to simplify it, I am trying to utilize a SQL table that I can use to use in my code.
Prior to thinking of using the table, my query would have looked like this:
Select * from dbo.SomeTable
where (Val1 = 'ME' and val2 = 17 and val3 = 'Apple')
or (Val1 = 'GE' and Val2= 7 and Val3 = 'Google')
I would like to use this table below to be able to dynamically accomplish a similar thing
Table1
Val1 Val2 Val3
ME 17 Apple
GE 7 Google
Is there any good way to do that?
Thanks.
Unless you have oversimplified your intentions you just need to join your tables
Select st.*
from dbo.SomeTable st
join Table1 t on t.val1=st.val1 and t.val2=st.val2 and t.val3=st.val3
alternatively you can use exists
select *
from dbo.SomeTable st
where exists (select * from Table1 t where t.val1=st.val1 and t.val2=st.val2 and t.val3=st.val3)
Related
Is it possible to add (put) a result of SUM() ORDER BY in original table?
A Table
Columns id,value,val2
1,200,1
2,300,3
3,300,2
4,400,4
5,100,1
6,100,1
7,100,1
8,100,4
TOTAL 1 = 500 * 1.5 = 750
B Table
Columns id,value,val2
1,100,50
2,500,33
3,600,0
5.900,0
Ideal
B Table
Columns id,value,val2
1,100,770
2,500,33
3,600,0
5.900,0
SELECT A.id , SUM ( value)*1.5 AS VITAMIN_D FROM A WHERE val2 in (SELECT id from B)
I would like to UPDATE val3 in B-table to add The results of SUM(value).
How Can I do?
I think you want a correlated subquery:
update tableb
set val3 = (
select sum(value) * 1.5
from tablea a
where a.val2 = tableb.id
)
Is the following posible on SQL? (Using SQLITE3)
UPDATE Table SET
Value1 = (SELECT ...)
Value2 = Value3/Value1; # The new value1!!! Not the value currently on the DB
Right now I need to do something like:
UPDATE Table SET
Value1 = (SELECT ...)
Value2 = Value3/(SELECT ...);
This makes the code quite long. Imagine it is not only Value1 I am updating but other fields too.
So the only solution I found is to do 2 UPDATES. First:
UPDATE Table SET
Value1 = (SELECT ...);
And then
UPDATE Table SET
Value2 = Value3/Value1;
Anyone with a more "beautiful" way of doing this?
Thanks,
In SQLite 3.8.3 or later, you can use a common table expression:
WITH u(v) AS (
SELECT ...
)
UPDATE MyTable
SET Value1 = (SELECT v FROM u),
Value2 = Value3 / (SELECT v FROM u);
(This even works with correlated subqueries.)
Maybe you can try replace
replace into table2
(Value1 , Value2)
select src.Value1 , src.Value3 / src.Value1
from table1 src
In sql you cant do UDPATE ... FROM as explain in this answer
You can do like this :
update Table1 set szNo = KO.nNo
from
(select nNo From Table2) KO
Is it possible to SELECT value of two or more columns with one shot of CASE statement? I mean instead of:
select
ColumnA = case when CheckColumn='condition' then 'result1' end
,ColumnB = case when CheckColumn='condition' then 'result2' end
Something like:
select case when CheckColumn='condition' then ColumnA='result1', ColumnB='result2' end
UPDATE
Just the same as we can do with the UPDATE statement:
update CTE
set ColumnA='result1', ColumnB='result2'
where CheckColumn='condition'
It is not possible with CASE expression.
For every column you need new CASE
It is not possible, but you could use a table value constructor as a work around to this, to store each value for columna and columnb against your check column:
SELECT t.CheckColumn,
v.ColumnA,
v.ColumnB
FROM dbo.YourTable AS t
LEFT JOIN
(VALUES
('Condition1', 'Result1', 'Result2'),
('Condition2', 'Result3', 'Result4'),
('Condition3', 'Result5', 'Result6')
) AS v (CheckColumn, ColumnA, ColumnB)
ON v.CheckColumn = t.CheckColumn;
If you have more complex conditions, then you can still apply this logic, but just use a pseudo-result for the join:
SELECT t.CheckColumn,
v.ColumnA,
v.ColumnB
FROM dbo.YourTable AS t
LEFT JOIN
(VALUES
(1, 'Result1', 'Result2'),
(2, 'Result3', 'Result4'),
(3, 'Result5', 'Result6')
) AS v (ConditionID, ColumnA, ColumnB)
ON v.ConditionID = CASE WHEN <some long expression> THEN 1
WHEN <some other long expression> THEN 2
ELSE 3
END;
The equivalent select to the update is:
select 'result1', 'result2'
. . .
where CheckColumn = 'condition';
Your select is different because it produces NULL values. There is an arcane way you can essentially do this with outer apply:
select t2.*
from . . . outer apply
(select t.*
from (select 'result1' as col1, 'result2' as col2) t
where CheckColumn = 'condition'
) t2;
This will return NULL values when there is no match. And, you can have as many columns as you would like.
What I understood from your question is that you want to update multiple columns if certain condition is true.
For such situation you have to use MERGE statements.
Example of using MERGE is as given on msdn here.
Code example:
-- MERGE statement for update.
USE [Database Name];
GO
MERGE Inventory ity
USING Order ord
ON ity.ProductID = ord.ProductID
WHEN MATCHED THEN
UPDATE
SET ity.Quantity = ity.Quantity - ord.Quantity;
More MERGE statement example here.
You could solve this maybe with a CTE or a CROSS APPLY, somehting like
DECLARE #tbl2 TABLE(inx INT, val1 VARCHAR(10),val2 VARCHAR(10));
INSERT INTO #tbl2 VALUES(1,'value1a','value1b'),(2,'value2a','value2b'),(3,'value2a','value2b');
UPDATE yourTable SET col1=subTable.val1,col2=subTable.val2
FROM yourTable
CROSS APPLY(
SELECT val1,val2
FROM #tbl2
WHERE inx=1 --YourCondition
) AS subTable
Just curious about the IN statement in SQL.
I know I can search multiple columns with one value by doing
'val1' IN (col1,col2)
And can search a column for multiple values
col1 IN ('val1','val2')
But is there a way to do both of these simultaneously, without restorting to an repeating AND / OR in the SQl? I am looking to do this in the most scalable way, so independent of how many vals / cols i need to search in.
So essentially:
('val1','val2') IN (col1,col2)
but valid.
You could do something like this (which I've also put on SQLFiddle):
-- Test data:
WITH t(col1, col2) AS (
SELECT 'val1', 'valX' UNION ALL
SELECT 'valY', 'valZ'
)
-- Solution:
SELECT *
FROM t
WHERE EXISTS (
SELECT 1
-- Join all columns with all values to see if any column matches any value
FROM (VALUES(t.col1),(t.col2)) t1(col)
JOIN (VALUES('val1'),('val2')) t2(val)
ON col = val
)
Of course, one could argue, which version is more concise.
Yes, for example you can do this in Oracle:
select x, y from (select 1 as x, 2 as y from dual)
where (x,y) in (select 1 as p, 2 as q from dual)
I have a database table in SQL Server 2008 with 5 nvarchar(max) columns. We're using the CONTAINS function to look for text in these columns.
We can look in all five columns using this kind of query:
SELECT *
FROM SomeTable ST
WHERE CONTAINS( (ST.ColumnA, ST.ColumnB, ST.ColumnC, ST.ColumnD, ST.ColumnE) , '"Strawberry"')
Now we want to search for text for one or more of these columns dynamically. For example, only look in ColumnB and ColumnE. I tried using a CASE statement, but I couldn't.
The only solution I can think of is dynamic SQL, but I'd prefer to avoid this. (The full query is very complicated.) Is there a way to do this without using dynamic SQL?
The only way I can think of to avoid using dynamic SQL involves using a temp table and if statements and stored proc. Have a stored proc with parameters for each of the columns that include the text to search that columns for. Create a temp table or table variable to store interim results.
Have five different if statements one for each possible column. In each if insert to the temp table if the variable is not null. something like:
IF #ColA is not null
BEGIN
INSERT INTO #temp
SELECT * FROM SomeTable ST
WHERE CONTAINS( (ST.ColumnA) , #ColA)
END
At the end select from the temp table to show your result.
This only works well though if you don't have very many columns and it would be unlikely that more will be added. Frankly, the fact that you have multiple columns you need to do full text search for the same search string indicates to me that you may have a basic problem with the database design.
I just can think in a solution like this, but this doesn't use full text Search... let me know if it is useful for you.
SELECT *
FROM SomeTable ST
WHERE 1=1
AND ((#colA = '') OR ST.ColumnA LIKE #colA)
AND ((#colB = '') OR ST.ColumnB LIKE #colB)
AND ((#colC = '') OR ST.ColumnC LIKE #colC)
AND ((#colD = '') OR ST.ColumnD LIKE #colD)
AND ((#colE = '') OR ST.ColumnE LIKE #colE)
The search_on parameters would be bit (0, 1) so, when set on 1, the search on that column would be activated.
You could UNION the 5 individual cases, then PIVOT and concatenate. I'm not sure it's any better than dynamic SQL.
You would end up with something like:
SET #FindKey = '%B%E%' -- This is your search which field criteria
WITH RESULTS1 AS (
SELECT PK, 'A' AS Col
FROM SomeTable ST
WHERE #FindKey LIKE '%A%' AND CONTAINS(ST.ColumnA, '"Strawberry"')
UNION
SELECT PK, 'B' AS Col
FROM SomeTable ST
WHERE #FindKey LIKE '%B%' AND CONTAINS(ST.ColumnB, '"Strawberry"')
UNION
SELECT PK, 'C' AS Col
FROM SomeTable ST
WHERE #FindKey LIKE '%C%' AND CONTAINS(ST.ColumnC, '"Strawberry"')
UNION
SELECT PK, 'D' AS Col
FROM SomeTable ST
WHERE #FindKey LIKE '%D%' AND CONTAINS(ST.ColumnD, '"Strawberry"')
UNION
SELECT PK, 'E' AS Col
FROM SomeTable ST
WHERE #FindKey LIKE '%E%' AND CONTAINS(ST.ColumnE, '"Strawberry"')
)
,RESULTS2 AS (
SELECT PK, ISNULL([A], '') + ISNULL([B], '') + ISNULL([C], '') + ISNULL([D], '') + ISNULL([E], '') AS FoundKey
FROM RESULTS PIVOT ( MIN(Col) FOR Col IN ([A], [B], [C], [D], [E]) ) AS pvt
)
SELECT *
FROM SomeTable
INNER JOIN RESULTS2
ON RESULTS2.PK = SomeTable.PK
WHERE RESULTS2.FoundKey LIKE #FindKey