使用不存在插入和嵌套选择语句的SQL

Question

I am doing a Work in Progress summary that feeds graphs for my boss, he wants to store the data so the graphs can show comparisons last year, last quarter, last month and today.

I had a couple sql statements that handle this fine but I was trying to consolidate into one statement.

SQL:

INSERT INTO `wip_summary` (`wk_num`, `year`, `a_cnt`, `ae_cnt`, `b_cnt`, `sm_cnt`, `xx_cnt`, `tm_cnt`, `svc_cnt`, `ci_cnt`, `a_amt`, `ae_amt`, `b_amt`, `tm_amt`, `sm_amt`, `xx_amt`, `svc_amt`, `ci_amt`)
   SELECT
      WEEK(CURDATE()),
      YEAR(CURDATE()),
      SUM(CASE WHEN `emc` = '0'
                  AND `c_price` >= 10000
                  AND `contractInstall` = '0'
                  AND `terms` <> 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN 1 ELSE 0 END) AS `a_cnt`,
      SUM(CASE WHEN `emc` = 1 THEN 1 ELSE 0 END) AS `ae_cnt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `c_price` >= 3500
                  AND `c_price` < 10000
                  AND `contractInstall` = '0'
                  AND `terms` <> 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN 1 ELSE 0 END) AS `b_cnt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `c_price` >= 600
                  AND `c_price` < 3500
                  AND `contractInstall` = '0'
                  AND `terms` <> 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN 1 ELSE 0 END) AS `sm_cnt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `c_price` < 600
                  AND `contractInstall` = '0'
                  AND `terms` <> 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN 1 ELSE 0 END) AS `xx_cnt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `contractInstall` = '0'
                  AND `terms` = 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN 1 ELSE 0 END) AS `tm_cnt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `wo_type` = 'SERVICE ORDER'
                  AND `contractInstall` = '0'
          THEN 1 ELSE 0 END) AS `svc_cnt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `contractInstall` = '1'
          THEN 1 ELSE 0 END) AS `ci_cnt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `c_price` >= 10000
                  AND `contractInstall` = '0'
                  AND `terms` <> 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN `c_price` ELSE 0 END) AS `a_amt`,
      SUM(CASE WHEN `emc` = 1 THEN `c_price` ELSE 0 END) AS `ae_amt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `c_price` >= 3500
                  AND `c_price` < 10000
                  AND `contractInstall` = '0'
                  AND `terms` <> 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN `c_price` ELSE 0 END) AS `b_amt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `contractInstall` = '0'
                  AND `terms` = 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN `c_price` ELSE 0 END) AS `tm_amt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `c_price` >= 600
                  AND `c_price` < 3500
                  AND `contractInstall` = '0'
                  AND `terms` <> 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN `c_price` ELSE 0 END) AS `sm_amt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `c_price` < 600
                  AND `contractInstall` = '0'
                  AND `terms` <> 'TIME AND MATERIAL'
                  AND `wo_type` <> 'SERVICE ORDER'
          THEN `c_price` ELSE 0 END) AS `xx_amt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `wo_type` = 'SERVICE ORDER'
                  AND `contractInstall` = '0'
          THEN `c_price` ELSE 0 END) AS `svc_amt`,
      SUM(CASE WHEN `emc` = '0'
                  AND `contractInstall` = '1'
          THEN `c_price` ELSE 0 END) AS `ci_amt`
    FROM (SELECT CAST(REPLACE(REPLACE(`contract_price`, ',', ''), '$', '') AS Decimal(10,2)) AS `c_price`,
                 `emc`,
                 `contractInstall`,
                 `wo_type`,
                 `terms`
            FROM `orders`
    WHERE `auth_status` = 'ACTIVE') AS `cp_tbl`
WHERE NOT EXISTS (SELECT 1 FROM `wip_summary` WHERE `wk_num` = WEEK(CURDATE()) AND `year` = YEAR(CURDATE()));

What I am doing broken down:

1. Check to see if the records for this week in this year are in the database
2. Getting the count or summing the dollar amount based on specified criteria

It works great unless the week and year are in the table, then I get a row of column defaults.

So the WHERE NOT EXISTS is what is failing me but I can't seem to put my finger on why or how.

Without the nested SELECT statement the INSERT ... WHERE NOT EXISTS works, without the INSERT ... WHERE NOT EXISTS statement the SELECT statement works.

Answer 1

Replace the second WHERE with AND. If you don't the Select will always produce data. If you do, the select won't give data, because the year/weak combination already exists in the wip_summary.

Change this part:

        FROM `orders`
    WHERE `auth_status` = 'ACTIVE') AS `cp_tbl`
WHERE NOT EXISTS (SELECT 1 FROM `wip_summary` WHERE `wk_num` = WEEK(CURDATE()) AND `year` = YEAR(CURDATE()));

to

        FROM `orders`
    WHERE `auth_status` = 'ACTIVE') 
    AND NOT EXISTS 
(SELECT 1 FROM `wip_summary` WHERE `wk_num` = WEEK(CURDATE()) AND `year` = YEAR(CURDATE()))
AS `cp_tbl`;

Answer 2

I was able to resolve by adding a SELECT * FROM () statement wrapping the complex one I had.

INSERT INTO `wip_summary` (`wk_num`, `year`, `a_cnt`, `ae_cnt`, `b_cnt`, `sm_cnt`, `xx_cnt`, `tm_cnt`, `svc_cnt`, `ci_cnt`, `a_amt`, `ae_amt`, `b_amt`, `tm_amt`, `sm_amt`, `xx_amt`, `svc_amt`, `ci_amt`)
   SELECT * FROM (SELECT
      WEEK(CURDATE()),
      YEAR(CURDATE()),
      SUM(CASE WHEN `emc` = '0' [...]) AS `a_cnt`,
      SUM(CASE WHEN `emc` =  1  [...]) AS `ae_cnt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `b_cnt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `sm_cnt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `xx_cnt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `tm_cnt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `svc_cnt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `ci_cnt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `a_amt`,
      SUM(CASE WHEN `emc` =  1  [...]) AS `ae_amt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `b_amt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `tm_amt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `sm_amt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `xx_amt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `svc_amt`,
      SUM(CASE WHEN `emc` = '0' [...]) AS `ci_amt`
    FROM (SELECT [...] AS `c_price`,
                 `emc`,
                 `contractInstall`,
                 `wo_type`,
                 `terms`
            FROM `orders`
            WHERE `auth_status` = 'ACTIVE') AS `cp_tbl`) AS `vals`
WHERE NOT EXISTS (SELECT 1 FROM `wip_summary` WHERE `wk_num` = WEEK(CURDATE()) AND `year` = YEAR(CURDATE()));

I may be wrong, but I believe the issue was that the SELECT statement that represented the values conflicted with the INSERT 's WHERE clause.

The WHERE inside the FROM statement had no conflict, when I removed it and simplified the FROM it still worked the same (inserting a row whether a record was present or not).