Dynamic SQL

I'm looking to change a call date from a static subquery like..

where a.CALL_DATE between '12/1/2012' and '12/31/2012' 

Open in new window


to Dynamic SQL so that it pulls dates between the first and last day of the previous month.

Can anyone give me an idea to do this?
sonofstimpy1Asked:
Who is Participating?
 
Steve WalesSenior Database AdministratorCommented:
I believe this is pretty close (I don't have your data structures to test it on).   I replaced exec (@sql) with print @sql and it looked pretty close to what is needed without actually running it.

declare @start datetime
declare @end datetime
declare @end2 datetime
declare @today datetime
declare @sql nvarchar(4000)
 
SELECT @Today = dateadd(dd, datediff(dd, 0, getdate())+0, 0)     -- Today's Date, midnight past
SELECT @Today = DATEADD(month, -1, @Today);                      -- One Month back
SELECT @start = DATEADD(dd,-(DAY(DATEADD(mm,1,@Today))-1),DATEADD(mm,0,@Today))  -- First of last month
SELECT @end = DATEADD(dd, -DAY(DATEADD(m,1,@Today)), DATEADD(m,1,@Today))      -- Last of last month
SELECT @end2 = DATEADD(dd,-(DAY(DATEADD(mm,1,@Today))-1),DATEADD(mm,1,@Today))  -- First of this month
 
set @sql = 
'select c.TAX_ID as "TAXID",  date( rtrim( char(year (current_date - 1 month)))||''-''||rtrim(char(month (current_date - 1 month)))||''-01'') as "RUN_DT", 320 as "TYP", Count(*) as "cnt" ' +
'from ' +
'(select a.SERVER_CD, a.PORT_NUMBER, a.CALL_DATE, a.CALL_START_TIME, b.TAX_ID, b.MODULE_NAME ' +
   'from hum.a_vrhcal a, hum.a_vrhact b ' +
   'where a.CALL_DATE between '''+convert(char(8), @start, 112)+''' and '''+convert(char(8), @end, 112)+''' ' +
    'and a.CALLER_TYPE_IND = ''P'' ' +
    'and not a.server_cd like ''D%'' ' +
    'and not a.server_cd = ''PR'' ' +
    'and not b.MODULE_NAME = ''GREETING'' ' +
    'and not b.MODULE_NAME like  ''%ELIGIBILITY%'' ' +
    'and not b.MODULE_NAME like ''%CLAIM%'' ' +
    'and not b.MODULE_NAME like ''%PRECERTIFICATION%'' ' +
    'and not b.MODULE_NAME like ''%REFERRALS%'' ' +
    'and not b.MODULE_NAME IN (''MAIN MENU'',''AALTDRUGLST'',''AAPID'',''ACOMEM'',''ACONFDOB'',''ACONFDRUGNAME'',''ACONFMID'',''ACPID'',''ADOBP'',''ADOBPT'',''ADRUGNAME'',''AENDM'',''AFAXYESNO'',''AGETDOSAGE'',''AGETFAX'',''AHEARAGAIN'',''ALTDRUGTRANS'',''AMID'',''ANEEDSMET'',''ANEWREQHWSE'',''ASPECNOMID'',''ASTATORREQ'',''AVERFAX'',''DRUGDETAILTRANS'',''DrugPricing_Reason'',''DRUGPRICINGREASON'',''DRUGPRICINGTRANS'',''EESDEDUCT'',''EESFAMILY'',''FAXFORMAVAILTRANS'',''FAXSENDTRANS'',''LISTDRUGREPLY'',''RXArgusElig'',''VRAUTH'',''VRDAUTH'',''VRMAUTH'',''VRPAUTH'') ' +
    'and not a.DNIS = 3055 ' +
    'and a.SERVER_CD = b.SERVER_CD ' +
    'and a.PORT_NUMBER = b.PORT_NUMBER ' +
    'and a.CALL_DATE  = b.CALL_DATE ' +
    'and a.CALL_START_TIME = b.CALL_START_TIME ' +
'group by a.SERVER_CD, a.PORT_NUMBER, a.CALL_DATE, a.CALL_START_TIME, b.TAX_ID, b.MODULE_NAME) as c ' +
'group by TAX_ID,  date( rtrim( char(year (current_date - 1 month)))||''-''||rtrim(char(month (current_date - 1 month)))||''-01''), MODULE_NAME;'
 
exec (@sql)

Open in new window


As mentioned in the original reply, depending upon how your dates are stored you may need to tweak it just a little in order to account for times, if they are included in your date column too.
0
 
Steve WalesSenior Database AdministratorCommented:
This works if your call_Date is always just the date and does not care about the time.

declare @start datetime
declare @end datetime
declare @end2 datetime
declare @today datetime
declare @sql nvarchar(4000)

SELECT @Today = dateadd(dd, datediff(dd, 0, getdate())+0, 0)     -- Today's Date, midnight past
SELECT @Today = DATEADD(month, -1, @Today);                      -- One Month back
SELECT @start = DATEADD(dd,-(DAY(DATEADD(mm,1,@Today))-1),DATEADD(mm,0,@Today))  -- First of last month
SELECT @end = DATEADD(dd, -DAY(DATEADD(m,1,@Today)), DATEADD(m,1,@Today))      -- Last of last month
SELECT @end2 = DATEADD(dd,-(DAY(DATEADD(mm,1,@Today))-1),DATEADD(mm,1,@Today))  -- First of this month

set @sql = 'select mydate from mytable where mydate between '''+convert(char(8), @start, 112)+''' and '''+convert(char(8), @end, 112)+''''
exec (@sql)

Open in new window


If you have time as well, use @end2 (which is the first of this month) and instead of between construct a where clause that's

>= @start and < @end2
0
 
sonofstimpy1Author Commented:
How would I fit this into this example of code I already have?
Noting line 5 is the part I need to make dynamic...

select c.TAX_ID as "TAXID",  date( rtrim( char(year (current_date - 1 month)))||'-'||rtrim(char(month (current_date - 1 month)))||'-01') as "RUN_DT", 320 as "TYP", Count(*) as "cnt"
from 
(select a.SERVER_CD, a.PORT_NUMBER, a.CALL_DATE, a.CALL_START_TIME, b.TAX_ID, b.MODULE_NAME
   from hum.a_vrhcal a, hum.a_vrhact b
   where a.CALL_DATE between  '12/1/2012' and '12/31/2012'
    and a.CALLER_TYPE_IND = 'P'
    and not a.server_cd like 'D%'
    and not a.server_cd = 'PR'
    and not b.MODULE_NAME = 'GREETING'
    and not b.MODULE_NAME like  '%ELIGIBILITY%'
    and not b.MODULE_NAME like '%CLAIM%'
    and not b.MODULE_NAME like '%PRECERTIFICATION%'
    and not b.MODULE_NAME like '%REFERRALS%'
    and not b.MODULE_NAME IN ('MAIN MENU','AALTDRUGLST','AAPID','ACOMEM','ACONFDOB','ACONFDRUGNAME','ACONFMID','ACPID','ADOBP','ADOBPT','ADRUGNAME','AENDM','AFAXYESNO','AGETDOSAGE','AGETFAX','AHEARAGAIN','ALTDRUGTRANS','AMID','ANEEDSMET','ANEWREQHWSE','ASPECNOMID','ASTATORREQ','AVERFAX','DRUGDETAILTRANS','DrugPricing_Reason','DRUGPRICINGREASON','DRUGPRICINGTRANS','EESDEDUCT','EESFAMILY','FAXFORMAVAILTRANS','FAXSENDTRANS','LISTDRUGREPLY','RXArgusElig','VRAUTH','VRDAUTH','VRMAUTH','VRPAUTH')

    and not a.DNIS = 3055
    and a.SERVER_CD = b.SERVER_CD
    and a.PORT_NUMBER = b.PORT_NUMBER
    and a.CALL_DATE  = b.CALL_DATE
    and a.CALL_START_TIME = b.CALL_START_TIME
group by a.SERVER_CD, a.PORT_NUMBER, a.CALL_DATE, a.CALL_START_TIME, b.TAX_ID, b.MODULE_NAME) as c
group by TAX_ID,  date( rtrim( char(year (current_date - 1 month)))||'-'||rtrim(char(month (current_date - 1 month)))||'-01'), MODULE_NAME;

Open in new window

0
 
sonofstimpy1Author Commented:
Great work sjwales!
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.