CASE Statement MYSQL with Condition - mysql

I got 2 CASE statements: First CASE statement is as follows:
Case When ((cust_shipmentdate_awb Is Null OR cust_shipmentdate_awb = '')
AND (comp_shipdate_awb IS NULL OR comp_shipdate_awb = '')) Then 'Pending'
ELSE 'Shipped' End AS shipment_status
The Second CASE statement is as follows:
Case When apbg_bal_pay_amt ='0' Then 'Received'
Else 'Pending' End AS payment_status
Iam looking to write one more CASE statement named OVERALL_Status. That is basically a combination of both this CASES (shipment_status and payment_status), which means if Shipment status is 'Shipped' AND Payment_Status is 'Received' then Overall_status is 'Completed' else 'Not Completed'. Can anyone please help me on this. I am really struck here. I tried the combination of both the CASES, but not working:
Case When (cust_shipmentdate_awb Is Null OR cust_shipmentdate_awb = '') AND
(comp_shipdate_awb IS NULL OR comp_shipdate_awb = '') AND (apbg_bal_pay_amt != '0') Then
'Pending' ELSE 'Completed' End AS overall_status

There is two solutions as I see it:
1. You make the current query a subquery and add another CASE statement on the result of the subquery. (the pretty solution as I see it)
2. You add another WHEN to the existing case. Combining the clauses in the first two WHEN clauses to get the result. (probably the most optimized solution)

How about this?
(case when (cust_shipmentdate_awb Is Null OR cust_shipmentdate_awb = '') and
(comp_shipdate_awb IS NULL OR comp_shipdate_awb = '')
then 'Not Completed'
when apbg_bal_pay_amt = '0' Then 'Completed'
else 'Not Completed'
end) as overall_status

Related

Mysql: If a field in a record is empty I want the stored procedure to return N/A as value

I have a table in MySQL where in a record a field (Default: None) does not have any value.
I'm using a stored procedure to select values from this table and I when this field has no value I should get the value N/A.
I tried the following code but I get the field with no value.
SELECT md.coding_id,
md.patient_id,
md.implant_date,
(case
when md.device_and_implant_description = ''
then 'N/A'
when md.device_and_implant_description !=0
then md.device_and_implant_description
end) as device_and_implant_description
FROM medical_devices_mapping as md
WHERE md.patient_id = p_id
The p_id value is given by the user.
This is the result:
This is the structure of my table:
Please use NUll as well as "".
If you want to use NULL or '' only then before storing data, make sure that you are storing null or empty string then accordingly use condition.
Use REGEXP condition instead of ''
SELECT md.coding_id, md.patient_id, md.implant_date,
CASE WHEN md.device_and_implant_description REGEXP '^[A-Za-z0-9]+$'
THEN md.device_and_implant_description
ELSE 'N/A'
END AS device_and_implant_description,
md.device_and_implant_description
FROM medical_devices_mapping md
WHERE md.patient_id = p_id
Maybe you should invert your logic
case when trim(md.device_and_implant_description) is not null then md.device_and_implant_description
else 'N/A'
end
I found the solution using COALESCE().
The proposed solution is the following:
SELECT md.coding_id,
md.patient_id,
md.implant_date,
(CASE when COALESCE(md.device_and_implant_description, '') !=''
then md.device_and_implant_description
when COALESCE(md.device_and_implant_description, '') =''
then 'N/A'
end) as device_and_implant_description
FROM medical_devices_mapping as md
WHERE md.patient_id = p_id

If Else condition in mysql to check null

How should I make if condition in mysql where time = null then I want result in NO else YES?
SELECT
case when TIME_TO_SEC(TIMEDIFF(Event01.EndTime ,Event01.StartTime)) != NULL THEN
#Loss:='YES'
ELSE
#Loss:='NO'
END AS Loss
from Event01,(SELECT #Loss:= 0) AS Loss
Query
SET #Loss := 0;
SELECT
#Loss:= case when TIME_TO_SEC(TIMEDIFF(Event01.EndTime ,Event01.StartTime)) IS NOT NULL
THEN 'YES'
ELSE 'NO' END
FROM Event01;
Try this, You have to check NULL using is clause.
SELECT
case when TIME_TO_SEC(TIMEDIFF(Event01.EndTime ,Event01.StartTime)) is not NULL THEN
'YES'
ELSE
'NO'
END AS Loss
from Event01
Hope it will help.
Try this
SELECT case when TIME_TO_SEC(TIMEDIFF(Event01.EndTime ,Event01.StartTime)) IS NULL THEN 'NO' ELSE 'YES' END AS Loss from Event01

Select a 'virtual' column if another column has a value or is null in a SQL view

I want to select ALWAYS a column in my view, and set it with CASES.
example:
SELECT isDone
,doneN
from...
I have to set isDone in this way:
if done is 1 isDone is 'yes'
if done is 0 isDone is 'no'
(doneN is a column from another table, isDone instead doesn't exist in other tables, so it's a "virtual" column)
Thank you in advice
Is this what you want?
select (case when doneN = 1 then 'yes' else 'no' end) as isDoneN
. . .
You didn't specify whether 'done' will always be 0 or 1. If there are more values or you want to catch other values, use something like this:
select (case when done = 1 then 'yes'
when done = 0 then 'no'
else '' end) as isDone
, doneN
from ...
If the 'done' is constrained to be 0 or 1, you can use:
select (case when done = 1 then 'yes'
else 'np' end) as isDone
, doneN
from ...

Getting error with CASE expression using WHERE clause

declare #SP nvarchar(3)
SELECT HDR.SOPNUMBE, HDR.docdate, HDR.pymtrmid,
RTRIM(HDR.ShipToName) +
CASE WHEN HDR.ADDRESS1 <> '' THEN char(10) + RTRIM(HDR.ADDRESS1) ELSE '' END
FROM vSOPHdr HDR
WHERE HDR.SOPTYPE = 2 AND
(CASE WHEN HDR.SLPRSNID <> 'All'
then HDR.SLPRSNID in (''+#SP+'')
else HDR.SLPRSNID between '0' and 'ZZZZZZZZZZZZZZZ'
end)
I am trying to run the above query in sql query analyzer but getting 'syntax' errors in the CASE expression (near IN, ELSE). What could be wrong?
All I want to do is when sales-personID is selected as ALL in the report parameter I would like to process all sales person else only the selected sales person ID.
Just a background about what I am doing,
I have a similar query to the above query (without the CASE condition) within a dataset for a SSRS report.
Note that #SP is a report parameter.
CASE is an expression that returns a single value. It cannot be used for control-of-flow logic, like in other languages such as VB. Try:
WHERE HDR.SOPTYPE = 2 AND
((HDR.SLPRSNID <> 'All' AND HDR.SLPRSNID = #SP)
OR
(HDR.SLPRSNID = 'All'))
Though it seems like maybe you need instead, which would make more logical sense if the user is potentially passing 'All' into the parameter:
WHERE HDR.SOPTYPE = 2 AND
((#SP <> 'All' AND HDR.SLPRSNID = #SP)
OR
(#SP = 'All'))
you can just use an OR clause
WHERE HDR.SOPTYPE = 2 AND
((HDR.SLPRSNID <> 'All' AND HDR.SLPRSNID IN (''+#SP+''))
OR
(HDR.SLPRSNID = 'All' AND HDR.SLPRSNID BETWEEN '0' and 'ZZZZZZZZZZ'))
Not sure if the BETWEEN '0' and 'ZZZZZZZZZZZ' means "IN everything". If yes, you can just remove it now.
If you absolutely wanna use a CASE WHEN, you can do it this way :
WHERE HDR.SOPTYPE =2
AND (CASE WHEN HDR.SLPRSNID <>'All' AND HRD.SLPRSNDID IN (''+#SP+'')) THEN 1
WHEN HDR.SLPRSNID = 'All' AND HDR.SLPRSNID BETWEEN '0' and 'ZZZZZZZZZZ' THEN 1
ELSE 0
END) = 1

using nested case condition in mysql query

if(qtype==3)
column=somecolumn;
else if(qtype==2)
{
if(open==0)
column=anycolumn;
else
column =somecolumn;
}
else{
acolumn,bcolumn,ccolumn //this else----|
} |
----------------|
I want to achieve the above nested if-else condition in my mysql query.where the condition will be based on one of the column.this is what i have done so far.
select qtype,open,(Case when qtype=2 then answer
Else (Case when qtype=3 then
(Case when open=0 then somecolumn
Else othercolumn End) End)
Else....//how to implement this else here)
i am in confusion how to integrate the last else part?
Thanks
The format is correct, but you switch the 2 and 3 compared to the if-else psuedocode at the begining:
select qtype,open,(Case when qtype=3 then answer
Else (Case when qtype=2 then
(Case when open=0 then somecolumn
Else othercolumn End) End))
Looking at the case syntax, here is what I came up with.
CASE qtype
WHEN 3 THEN column=somecolumn;
WHEN 2 THEN (CASE open WHEN 0 THEN column=anycolumn ELSE column = somecolumn)
ELSE othercolumn
END CASE