SQL查询和取消变量

Question

我试图运行此查询，但它没有返回任何内容。它将用户输入作为变量获取到查询中。有一件事我不得不提到哪个是用户离开batch_number s textbox empty, the query should return all the batches of the organization_ID`的时候。这里是查询：

SELECT Nvl(a.ORGANIZATION_ID, ' '), 
     Nvl(a.FILE_TYPE, ' '), 
     Nvl(a.BATCH_NUMBER, ' '), 
     Nvl(a.FILE_NAME, ' '), 
     Nvl(TOTAL_ANB_RECORDS, 0) 
FROM PAYMENT B, 
     PAYROLL A 
WHERE b.ORGANIZATION_ID = a.ORGANIZATION_ID 
     AND a.ORGANIZATION_ID = '1176' 
     AND PAYMENT_TYPE = '1' 
     AND Nvl(PAYMENT_STATUS, 'a') = '5' 
     AND (BM_BATCH_INDC = '0' 
       OR BM_BATCH_INDC = '1' 
       OR BM_BATCH_INDC = '3') 
     AND b.FILE_TYPE = a.FILE_TYPE 
     AND b.FILE_BATCH_NUMBER = a.BATCH_NUMBER 
     AND (b.FILE_BATCH_NUMBER = '"+textBox.text.ToString()+"' 
       OR b.FILE_BATCH_NUMBER IS NULL) 
     AND b.PAYMENT_PATH = '01'; 

Answer 1

假设，如果它是空白的数据来为NULL

只写

AND b.FILE_BATCH_NUMBER = NVL(a.BATCH_NUMBER,b.FILE_BATCH_NUMBER) 

在

AND b.FILE_BATCH_NUMBER = a.BATCH_NUMBER 
     AND (b.FILE_BATCH_NUMBER = '"+textBox.text.ToString()+"' 
       OR b.FILE_BATCH_NUMBER IS NULL) 

的地方，如果Batch_number为null它将返回true对于所有file_batch_number