星期几 select 大小写的语法是什么？

Question

如果那天是星期一（或 d 等于 2），我正在尝试使用案例 select，并且 'else' 将处理一周中的每隔一天。

   Select to_char (sysdate, 'D') d from dual,
/*if 2 or Monday then run this part*/
       CASE 
         2
           Then
            SELECT DISTINCT RPAD(CLAIM.CLAIM_NUMBER, 20) ||
                   LPAD(CLAIM.CLAIM_ID, 15, '0') ||
                   TO_CHAR(CLAIM.INCIDENT_DATE, 'MMDDYYYY') ||
                   LPAD(' ',2) ||
                   'D'  
              FROM CLAIM,CLAIMANT,INSURER,POLICY
             WHERE CLAIM.CLAIM_ID = CLAIMANT.CLAIM_ID
               AND POLICY.INSURER_NUMBER = INSURER.INSURER_NUMBER
               AND INSURER.INSURER_NUMBER NOT IN ('7','8')
               AND CLAIMANT.EXAMINER1_CODE NOT IN ('MAYCONV') 
               AND CLAIM.INSURANCE_TYPE = 2
               AND CLAIM.JURISDICTION_CODE <> 1
               AND CLAIMANT.CLAIMANT_TYPE_CODE in (4,7)
               /*if Monday then go 2 days back*/   
               AND CLAIMANT.EDIT_DATE > (SYSDATE - 2)

 /*if not equal to 2 or any day but Monday then run this part*/              
               Else
                 SELECT DISTINCT RPAD(CLAIM.CLAIM_NUMBER, 20) ||
                   LPAD(CLAIM.CLAIM_ID, 15, '0') ||
                   TO_CHAR(CLAIM.INCIDENT_DATE, 'MMDDYYYY') ||
                   LPAD(' ',2) ||
                   'D'  
              FROM CLAIM,CLAIMANT,INSURER,POLICY
             WHERE CLAIM.CLAIM_ID = CLAIMANT.CLAIM_ID
               AND POLICY.INSURER_NUMBER = INSURER.INSURER_NUMBER
               AND INSURER.INSURER_NUMBER NOT IN ('7','8')
               AND CLAIMANT.EXAMINER1_CODE NOT IN ('MAYCONV') 
               AND CLAIM.INSURANCE_TYPE = 2
               AND CLAIM.JURISDICTION_CODE <> 1
               AND CLAIMANT.CLAIMANT_TYPE_CODE in (4,7)   
                /*if not Monday then go 1 day back*/  
               AND CLAIMANT.EDIT_DATE > (SYSDATE - 1)
 /

Answer 1

我没有密切关注您的代码，但您似乎只想让 where 子句中的最后一个条件取决于星期几。

如果是这样，您需要类似的东西（警告：我没有检查代码中的任何其他内容以确保它正确或有效！）- 唯一的变化是在最后一行。您不需要 select... from dual 并且只需要编写一次 select 语句。

SELECT DISTINCT RPAD(CLAIM.CLAIM_NUMBER, 20) ||
                   LPAD(CLAIM.CLAIM_ID, 15, '0') ||
                   TO_CHAR(CLAIM.INCIDENT_DATE, 'MMDDYYYY') ||
                   LPAD(' ',2) ||
                   'D'  
              FROM CLAIM,CLAIMANT,INSURER,POLICY
             WHERE CLAIM.CLAIM_ID = CLAIMANT.CLAIM_ID
               AND POLICY.INSURER_NUMBER = INSURER.INSURER_NUMBER
               ............
 AND CLAIMANT.EDIT_DATE > SYSDATE - case to_char(sysdate, 'd') when 2 then 2 else 1 end

星期几 select 大小写的语法是什么？

What is the syntax for day of week select case?

sql

oracle

oracle10g