Re: Loops and Case Statements Involving Dates

On Mon, Aug 21, 2023 at 3:07 PM Anthony Apollis
<anthony(dot)apollis(at)gmail(dot)com> wrote:
>
> Please review my code and make recommendations where needed. I have this code:
> ```
> NUMBER OF LOOPS FOR POSTGRESQL ETL:
> SELECT
> CASE
> WHEN (((EXTRACT(DAY FROM
> ((CASE
> WHEN
> (SELECT DISTINCT "CALDAY" FROM “system”.”IMETA_ZACTPRIC1_Cust_Pricing_TA_BW” AS WEEK_NUMBER
> WHERE
> WEEK_NUMBER."CALDAY" = (SELECT MAX(DISTINCT "CALDAY") AS "Calendar day" FROM “system”.”IMETA_ZACTPRIC1_Cust_Pricing_TA_BW” AS WEEK_NUMBER)) IS NULL THEN '2020-07-01'
> ELSE
> (SELECT DISTINCT "CALDAY" FROM “system”.”IMETA_ZACTPRIC1_Cust_Pricing_TA_BW” AS WEEK_NUMBER
> WHERE
> WEEK_NUMBER."CALDAY" = (SELECT MAX(DISTINCT "CALDAY") AS "Calendar day" FROM “system”.”IMETA_ZACTPRIC1_Cust_Pricing_TA_BW” AS WEEK_NUMBER)) + interval '1 day'
> END))::timestamp - --start date
> (CAST(NOW() - INTERVAL '1 day' AS DATE))::timestamp)-1) --end date
> * -1)) <= 30 THEN 1
> ELSE
> CEIL(((EXTRACT(DAY FROM
> ((CASE
> WHEN
> (SELECT DISTINCT "CALDAY" FROM “system”.”IMETA_ZACTPRIC1_Cust_Pricing_TA_BW” AS WEEK_NUMBER
> WHERE
> WEEK_NUMBER."CALDAY" = (SELECT MAX(DISTINCT "CALDAY") AS "Calendar day" FROM “system”.”IMETA_ZACTPRIC1_Cust_Pricing_TA_BW” AS WEEK_NUMBER)) IS NULL THEN '2020-07-01'
> ELSE
> (SELECT DISTINCT "CALDAY" FROM “system”.”IMETA_ZACTPRIC1_Cust_Pricing_TA_BW” AS WEEK_NUMBER
> WHERE
> WEEK_NUMBER."CALDAY" = (SELECT MAX(DISTINCT "CALDAY") AS "Calendar day" FROM system."IMETA_ZINV_AP1_Invoice_data_TA_BW"" AS WEEK_NUMBER)) + interval '1 day'
> END))::timestamp - --start date
> (CAST(NOW() - INTERVAL '1 day' AS DATE))::timestamp)-1) --end date
> * -1)/30) --30 DAY INTERVALS UNLESS LESS
> END
> AS "Number of days"
>

“system”.”IMETA_ZACTPRIC1_Cust_Pricing_TA_BW”
seems like some of the characters look like double quotes, but it's
maybe not a double quote.
wiki: https://en.wikipedia.org/wiki/Quotation_mark.