I am trying to write a case statement something like this. Can someone help with the syntax
UPDATE A
CASE WHEN ATTDESC = 'ABC' THEN SET A.DESC = PG.VAL + ' - ' + LD.DESC + ' - ' + GH.PL3NAME
WHEN ATTDESC = 'DEF' THEN SET A.DESC = PG.VAL + ' - ' + LD.DESC + ' - ' + GH.PL3NAME
END
FROM ATTR A, PRODUCT PG, Global GH, Look LD
A CASE expression doesn't control flow; it returns a single value. So something like this:
...
SET [DESC]=CASE [ATTDESC]
WHEN 'ABC' THEN PG.VAL + ' - ' + LD.DESC + ' - ' + GH.PL3NAME
WHEN 'DEF' THEN PG.VAL + ' - ' + LD.DESC + ' - ' + GH.PL3NAME
ELSE [DESC]
END
FROM
...
Related
I have:
SELECT KEYWORDS = CAST(USRN AS VARCHAR(15)) + ' ' +
RTRIM(SD) + ' ' + RTRIM(NL.LOCALITY_NAME) + ' ' +
RTRIM(NT.TOWN_NAME) + ' ' + RTRIM(NA.AUTHORITY_NAME)
That gives me what looks like a column, but is not:
I want to have it so my code only selects the rows from KEYWORDS that match whatever the user is typing. Normally, if KEYWORDS was a column, I would write:
SELECT .... WHERE KEYWORDS = '%whateverTheUserIsTyping%'
but I cannot because keywords is not a real column and it is telling me that it does not exist.
How do I get around this? thanks
The column alias KEYWORDS isn't visible to the SQL Engine at the time that the WHERE clause is evaluated. You can just repeat your CAST statment, though.
SELECT
KEYWORDS = CAST(USRN AS VARCHAR(15)) + ' ' +
RTRIM(STREET_DESCRIPTOR) + ' ' + RTRIM(NSG_LOCALITY.LOCALITY_NAME) + ' ' +
RTRIM(NSG_TOWN.TOWN_NAME) + ' ' + RTRIM(NSG_AUTHORITY.AUTHORITY_NAME)
FROM yourTable
WHERE
CAST(USRN AS VARCHAR(15)) + ' ' +
RTRIM(STREET_DESCRIPTOR) + ' ' + RTRIM(NSG_LOCALITY.LOCALITY_NAME) + ' ' +
RTRIM(NSG_TOWN.TOWN_NAME) + ' ' + RTRIM(NSG_AUTHORITY.AUTHORITY_NAME)
LIKE '%whateverTheUserIsTyping%'
You can use derived table with an alias (here Q) and get the result from that by filtering in WHERE clause:
SELECT Q.KEYWORDS FROM (
SELECT KEYWORDS = CAST(USRN AS VARCHAR(15)) + ' ' +
RTRIM(STREET_DESCRIPTOR) + ' ' + RTRIM(NSG_LOCALITY.LOCALITY_NAME) + ' ' +
RTRIM(NSG_TOWN.TOWN_NAME) + ' ' + RTRIM(NSG_AUTHORITY.AUTHORITY_NAME)
) AS Q
WHERE Q.KEYWORDS LIKE '%whateverTheUserIsTyping%'
Because you can't use the column alias in the WHERE clause as you mentioned. Also instead of the KEYWORDS = '%whateverTheUserIsTyping%', you can use LIKE operator.
I can't seem to figure out how to use the opposite of isnull or ifnull statements in sql. I need to say if a.Error1 is not null -- then print the ' - ' and the + CHAR(13)+CHAR(10). Basically There should be no dash or no new line break if the a.Error1 comes back null. So print the information if the field isn't null.
select a. ....
' - ' + a.Error1 + CHAR(13)+CHAR(10) +
' - ' + a.Error2 + CHAR(13)+CHAR(10) +
' - ' + a.Error3 + CHAR(13)+CHAR(10) +
' - ' + a.Error4 + CHAR(13)+CHAR(10) +
' - ' + a.Error5 + CHAR(13)+CHAR(10) +
' - ' + a.Error6 as 'error_message'
...
from table1 a
For example if for a given record error1, 2 and 5 returned output I would like the output to be as follows:
- Error1: There was a ...
- Error2: ....
- Error5: The data was ...
If no errors existed for that row it should simply be an empty/null field.
You can use CASE:
SELECT a. ....
(CASE WHEN a.Error1 IS NOT NULL
THEN ' - ' + a.Error1 + CHAR(13)+CHAR(10)
ELSE ''
END) +
(CASE WHEN a.Error2 IS NOT NULL
THEN ' - ' + a.Error2 + CHAR(13)+CHAR(10)
ELSE ''
END) +
(CASE WHEN a.Error3 IS NOT NULL
THEN ' - ' + a.Error3 + CHAR(13)+CHAR(10)
ELSE ''
END) +
...etc
Yes! i know i'm like 5 years too late but i too enountered this problem.
It's weird how it doesn't exist some kind of !ISNULL() but whatever.
Try this for a cleaner code:
select a. ....
IIF(a.Error1 IS NOT NULL, ' - ' + a.Error1 + CHAR(13)+CHAR(10) , '') as Error1,
IIF(a.Error1 IS NOT NULL, ' - ' + a.Error1 + CHAR(13)+CHAR(10) , '') as Error2
from table1 a
Learn more about IIF() function : SQL Server IIF Function
The COALESCE function does what you want here. The result of COALESCE is the first NOT NULL value it is passed. Below we use '', which is distinct from NULL so that the outer + is always applied to NOT NULL strings.
e.g.
select a. ....
COALESCE( ' - ' + a.Error1 + CHAR(13)+CHAR(10), '' ) +
COALESCE( ' - ' + a.Error2 + CHAR(13)+CHAR(10), '' ) +
COALESCE( ' - ' + a.Error3 + CHAR(13)+CHAR(10), '' ) +
COALESCE( ' - ' + a.Error4 + CHAR(13)+CHAR(10), '' ) +
COALESCE( ' - ' + a.Error5 + CHAR(13)+CHAR(10), '' ) +
COALESCE( ' - ' + a.Error6 , '' ) as 'error_message'
...
from table1 a
SELECT (CASE WHEN a.Error1 IS NOT NULL
THEN ' - ' + a.Error1 + CHAR(13)+CHAR(10) +
ELSE a.Error1
END) +
(CASE WHEN a.Error2 IS NOT NULL
THEN ' - ' + a.Error2 + CHAR(13)+CHAR(10) +
ELSE a.Error2
END) +
.....etc
I have a query - which is combining with a Union statement the 5 columns into 2 columns.
So basically - an ID + Some Information. As the ID could be in column 2-5 - several times... I rearranged to be everything in one ID column + the text.
Now - I wanted to use a second "with" statement - to combine the IDs of several rows - with a XML path. But here I got stuck.
That is the code - which gives me the two column - with content as expected:
With
STall as (Select
'Status: ' + ST.Status + Char(10) + 'Crew Information:' + Char(10) +
'Instructor: ' + ST.IP + Char(10) + 'Student: ' + ST.SP + Char(10) + Case
When ST.ACM1 = 'NA' Then '' Else 'ACM1: ' + ST.ACM1 + Char(10) End + Case
When ST.ACM2 = 'NA' Then '' Else 'ACM2: ' + ST.ACM2 + Char(10)
End + 'Lesson: ' + ST.Lesson + Char(10) + Case
When ST.ScheduleRemarks = '' Then ''
Else ' REM:' + ST.ScheduleRemarks + Char(10)
End + 'Equipment: ' + ST.EquipmentName + ' (' + ST.Callsign + ')' +
Char(10) + 'Start: ' + Convert(VARCHAR(10),ST.ScheduleTO,104) + ' - ' +
Convert(VARCHAR(5),ST.ScheduleTO,108) + ' UTC' + Char(10) + 'End: ' +
Convert(VARCHAR(10),ST.ScheduleTD,104) + ' - ' +
Convert(VARCHAR(5),ST.ScheduleTD,108) + ' UTC' + Char(10) + Case
When ST.ATC = 'NA' Then '' Else ST.ATC End As SInfo,
ST.IDIP,
ST.IDSP,
ST.IDA1,
ST.IDA2
From
(Select
Case When Schedule.StatusRelease = 1 Then 'OK' Else Case
When Schedule.StatusRequest = 1 Then 'STBY' Else 'N/A' End
End As Status,
Schedule.ContactIDIP,
Schedule.ContactIDSP,
MasterLesson.Lesson,
Equipment.EquipmentName,
CallSignList.Callsign,
Schedule.Meeting,
Schedule.ScheduleRemarks,
Schedule.StatusRelease,
Schedule.StatusRequest,
Schedule.ScheduleDay,
ContactList.FullNameTLC As IP,
ContactList1.FullNameTLC As SP,
Case When Schedule.ContactIDACM1 = 0 Then 'NA'
Else ContactList2.FullNameTLC End As ACM1,
Case When Schedule.ContactIDACM2 = 0 Then 'NA'
Else ContactList3.FullNameTLC End As ACM2,
Schedule.ScheduleTO,
Schedule.ScheduleTD,
Case When Schedule.RouteID = 0 Then 'NA'
Else 'Route: ' + Airport.ICAO + ' - ' + Case
When IsNull(Airport1.ICAO, 'NA') = 'NA' Then ' '
Else Airport1.ICAO + ' - ' End + Airport2.ICAO + Char(10) + Char(13)
End As ATC,
ContactList.Id As IDIP,
ContactList1.Id As IDSP,
ContactList2.Id As IDA1,
ContactList3.Id As IDA2
From
Schedule Inner Join
StudentLesson On Schedule.ScheduleLessonID = StudentLesson.StudentLessonID
Inner Join
MasterLesson On StudentLesson.LessonID = MasterLesson.ID Inner Join
Equipment On Schedule.EquipmentID = Equipment.ID Left Join
CallSignList On CallSignList.ID = Schedule.CallSignListID Left Join
Route On Route.ID = Schedule.RouteID Inner Join
ContactList On ContactList.Id = Schedule.ContactIDIP Inner Join
ContactList ContactList1 On ContactList1.Id = Schedule.ContactIDSP
Left Join
ContactList ContactList2 On Schedule.ContactIDACM1 = ContactList2.Id
Left Join
ContactList ContactList3 On Schedule.ContactIDACM2 = ContactList3.Id
Left Join
Airport On Route.AirportID_Dep = Airport.ID Left Join
Airport Airport1 On Route.AirportID_Via = Airport1.ID Left Join
Airport Airport2 On Route.AirportID_Arr = Airport2.ID
Where
((Schedule.StatusRelease = 1) Or
(Schedule.StatusRequest = 1)) And
Schedule.ScheduleDay = '21.02.2014') As ST)
Select Distinct
STall.IDIP,SInfo
From
STall
where STall.IDIP > 0
UNION
Select Distinct
STall.IDSP,SInfo
From
STall
where STall.IDSP > 0
UNION
Select Distinct
STall.IDA1,SInfo
From
STall
where STall.IDA1 > 0
UNION
Select Distinct
STall.IDA2,SInfo
From
STall
where STall.IDA2 > 0
Now - I tried to add another With STtotal as ( in the beginning...
and
)
Select Distinct
STsub.IDIP,
SubString((Select
+Char(10) + STn1.SInfo As [text()]
From
STsub STn1
Where
STn1.IDIP = STtotal.IDIP
Order By
STn1.IDIP
For Xml Path('')), 2, 1000) ScheduleInfo
From
STtotal
But I get an error - with wrong Statement at "with".
Maybe there is another approach - how to combine - the "Info Text" column with all IDs - which could be in column 2-5.
Thanks for any imput
Separate your CTEs with a comma; the WITH only needs to be specified once:
;WITH CTE1 AS (
...
), CTE2 AS (
...
)
SELECT ...
Did you remember to put a semi colon at the end of the first statement?
I have a table which I'm querying using a dynamic conditional WHERE clause. I'm looking a best approach to get simple WHERE condition when all columns are null or when some columns has some value.
I tried something like this:
SET #CONDITIONS = CASE
WHEN #VEHICLE_TYPE_NAME IS NULL
THEN ' ISNULL(A.VEHICLE_TYPE_NAME,'''') = ISNULL(A.VEHICLE_TYPE_NAME,'''') '
ELSE ' A.VEHICLE_TYPE_NAME = ''' + #VEHICLE_TYPE_NAME + ''''
END + ' ' + CASE
WHEN CAST(#PRODUCT_ID AS VARCHAR(MAX)) IS NULL
THEN ' AND ISNULL(A.PRODUCT_ID, ''-1'') = ISNULL(A.PRODUCT_ID, ''-1'') '
ELSE ' AND A.PRODUCT_ID = ''' + CAST(#PRODUCT_ID AS VARCHAR(MAX)) + ''''
END + ' ' + CASE
WHEN CAST(#CAPABILITY_ID AS VARCHAR(MAX)) IS NULL
THEN ' AND ISNULL(A.CAPABILITY_ID,''-1'') = ISNULL(A.CAPABILITY_ID,''-1'') '
ELSE ' AND A.CAPABILITY_ID = ''' + CAST(#CAPABILITY_ID AS VARCHAR(MAX)) + ''''
END + ' ' + CASE
WHEN #SPONSOR_FIRM_ID IS NULL
THEN ' AND ISNULL(A.SPONSOR_FIRM_ID,'''') = ISNULL(A.SPONSOR_FIRM_ID,'''') '
ELSE ' AND A.SPONSOR_FIRM_ID = ''' + #SPONSOR_FIRM_ID + ''''
END + ' ' + CASE
WHEN #CLIENT_FIRM_ID IS NULL
THEN ' AND ISNULL(A.CLIENT_FIRM_ID,'''') = ISNULL(A.CLIENT_FIRM_ID,'''') '
ELSE ' AND A.CLIENT_FIRM_ID = ''' + #CLIENT_FIRM_ID + ''''
END + ' ' + CASE
WHEN CAST(#DIST_PLATFORM_ID AS VARCHAR(MAX)) IS NULL
THEN ' AND ISNULL(A.DIST_PLATFORM_ID,''-1'') = ISNULL(A.DIST_PLATFORM_ID,''-1'') '
ELSE ' AND A.DIST_PLATFORM_ID = ''' + CAST(#DIST_PLATFORM_ID AS VARCHAR(MAX)) + ''''
END + ' ' + CASE
WHEN #RR_INTERNAL_NUMBER IS NULL
THEN 'AND ISNULL(A.RR_INTERNAL_NUMBER,'''') = ISNULL(A.RR_INTERNAL_NUMBER,'''') '
ELSE ' AND A.RR_INTERNAL_NUMBER = ''' + #RR_INTERNAL_NUMBER + ''''
END
You don't need the part where your parameter is null. You can simply build up a dynamic SQL for each part
IF #PRODUCT_ID IS NOT NULL
#CONDITIONS = #CONDITIONS + ' AND A.PRODUCT_ID = ''' + CAST(#PRODUCT_ID AS VARCHAR(MAX)) + ''''
Why do you need dynamic SQL?
WHERE (#VEHICLE_TYPE_NAME IS NULL OR A.VEHICLE_TYPE_NAME = #VEHICLE_TYPE_NAME)
AND (#PRODUCT_ID IS NULL OR A.PRODUCT_ID = #PRODUCT_ID)
...
I have a dynamic query like this :
SET #str_Query = 'SELECT SIM.Item_ID,
SIM.Item_Description,
SU.Short_Description AS Unit,
SIM.Std_Lead_Time,'+
'' ''+' AS Last_Purchase_Rate
FROM FKMS_Item_Master AS SIM
INNER JOIN FKMS_STP_Units SU
ON SIM.Item_Purchase_Unit=SU.Unit_Id' +
' WHERE ' + #str_Condition +
' AND SIM.Location_Id =' + CAST(#aint_Location_Id AS VARCHAR(10)) +
' AND SIM.Item_Deleted =0
AND SIM.Approved_On IS NOT NULL'
+' ORDER BY SIM.Item_Description'
I want to retrieve space as Last_Purchase_Rate
It is showing syntax error in the portion of '' ''+' AS Last_Purchase_Rate
when I execute this query.
If I print this dynamic query, query seems correct. It shows as AS Last_Purchase_Rate with space before AS. Please help.
I would write
...SIM.Std_Lead_Time, '' '' AS Last_Purchase_Rate...
instead of
...SIM.Std_Lead_Time,'+'' ''+' AS Last_Purchase_Rate...
Why not use NULL instead of space and then handle the result in your app?
I.e.,
SET #str_Query = 'SELECT SIM.Item_ID,
SIM.Item_Description,
SU.Short_Description AS Unit,
SIM.Std_Lead_Time,
NULL AS Last_Purchase_Rate, -- and so on.
You could also use CHAR(32):
SET #str_Query = 'SELECT SIM.Item_ID,
SIM.Item_Description,
SU.Short_Description AS Unit,
SIM.Std_Lead_Time,
CHAR(32) AS Last_Purchase_Rate, -- and so on.
You did not escape all quotes.
A working version of your statement would be
SET #str_Query = 'SELECT SIM.Item_ID,
SIM.Item_Description,
SU.Short_Description AS Unit,
SIM.Std_Lead_Time,'
+ ''' '''
+ ' AS Last_Purchase_Rate
FROM FKMS_Item_Master AS SIM
INNER JOIN FKMS_STP_Units SU
ON SIM.Item_Purchase_Unit=SU.Unit_Id' +
' WHERE ' + #str_Condition +
' AND SIM.Location_Id =' + CAST(#aint_Location_Id AS VARCHAR(10)) +
' AND SIM.Item_Deleted =0
AND SIM.Approved_On IS NOT NULL'
+' ORDER BY SIM.Item_Description'
but I find that with a little reformatting, the error is easier to spot
SET #str_Query =
'SELECT SIM.Item_ID '
+ ', SIM.Item_Description '
+ ', SU.Short_Description AS Unit '
+ ', SIM.Std_Lead_Time '
+ ', '' ''' + ' AS Last_Purchase_Rate '
+ 'FROM FKMS_Item_Master AS SIM '
+ ' INNER JOIN FKMS_STP_Units SU '
+ ' ON SIM.Item_Purchase_Unit=SU.Unit_Id '
+ ' WHERE ' + #str_Condition
+ ' AND SIM.Location_Id = ' + CAST(#aint_Location_Id AS VARCHAR(10))
+ ' AND SIM.Item_Deleted =0 '
+ ' AND SIM.Approved_On IS NOT NULL '
+ ' ORDER BY SIM.Item_Description '
Try using tsql function SPACE(1)