Avatar of Angel02
Angel02 asked on

Add a substring in the SQL where clause

The where clause in my SQL statement is tricky. I need to call a function to get the where clause. But I need to send a column from the table to the function as a parameter. I am not sure what is the best way to do it.

The SQL statement is executed in a loop (5 times for 5 weeks)

DECLARE @currDate as datetime
DECLARE @currWk as int, @lastWk as int
SET @currDate = cast(Convert(varchar(10),GETDATE(),101) as datetime)
SET @currWk = DATEPART(wk, @currdate)
SET @lastWk = @currWk + 5

While @currWk < @lastWk

INSERT into #tempTable
SELECT [AWBILL], dbo.fn_get_current_ship('01/24/2018', [SHIPDATE]) as [SHIPON],[FARM],[FLOWER],[NAME],[UNITS],[UOM],[BOXES],([COST]) AS [COST],[MYID] FROM #tb_shipping  WHERE dbo.fn_getRealShipQuery('US',(CAST(CONVERT(char(10), dbo.fn_get_current_ship('01/24/2018', [SHIPDATE]), 102) AS datetime))) AND ([COUNTRY]='US')


fn_get_current_ship returns a date
fn_getRealShipQuery returns a string
Eg: (SUBSTRING(DATENAME(weekday,[SHIPDATE]), 1, 2) ='Fr') AND ([TYPE]='C')

I need to include this string in the where clause. But I can obtain this string based on the [SHIPDATE] column.

Is there a way I can do this in a single query and avoiding another loop?

Avatar of undefined
Last Comment

8/22/2022 - Mon

You need to modify your function to accept the shipdate column as parameter and return eiter 1 or 0 and then you can test it for this value.

With a signature like dbo.fn_Test(@country AS CHAR(2), @Shipdate DATE).

Using functions like this has a severe performance drawback. Thus you should conisder expanding the functions code to the actual query.

p.s. prior post was nonsense, cause dynamic SQL cannot refer to your actual rows colmn.

Modify the function (which one?) or add a new function?

Can you elaborate your response please?

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question

I considered " Depending on your existing functions you should consider to use their code directly in your query."
And figured out a way to do this directly in the query. Thanks!
Experts Exchange has (a) saved my job multiple times, (b) saved me hours, days, and even weeks of work, and often (c) makes me look like a superhero! This place is MAGIC!
Walt Forbes