Question

我有一个表格，偶尔导入时会在其中切换贷方和借方-因此，我有一些代码来设置变量，然后在变量匹配时进行交换，但是我无法让它在IF中运行语句，我试图将其放入存储过程中，但也无法在IF语句中运行该存储过程。你会推荐什么？参见下面的代码。谢谢

set @TotalCr = (select max(TotalCredit) from mbs_headers);

If (@TotalCr = (select sum(PDebit) from mbs_details) and @TotalCr =! (select sum(PCredit) from mbs_details)) 

then UPDATE mbs_detailstest SET PCredit=@tmp:=PCredit, PCredit=PDebit, PDebit=@tmp 
else 
end;

OR

set @TotalCr = (select max(TotalCredit) from mbs_headers);

If (@TotalCr = (select sum(PDebit) from mbs_details) and @TotalCr =! (select sum(PCredit) from mbs_details)) 

then exec TestSwapProc 
else 
end;

仅包含TestSwapProc

UPDATE mbs_detailstest SET PCredit=@tmp:=PCredit, PCredit=PDebit, PDebit=@tmp

样本数据- 表格：详细信息

Name, Credit, Debit
Mike, 100, 20
Mike, 10, 0

表：标题

name, totalcredits, totaldebits
Mike, 20, 110

我需要切换Details表以反映真实值，因为有时它会以错误的方式插入预期的结果：

表：详细信息

Name, Credits, Debits
Mike, 20, 100
Mike, 0, 10

标题表保持不变，因为它总是正确的

Answer 1

You can do something like this:

declare v_total decimal(10,2);
declare v_debit decimal(10,2);
declare v_credit decimal(10,2);

select max(TotalCredit) into v_total
from mbs_headers;

select sum(PDebit), sum(PCredit) into v_debit, v_credit 
from mbs_details;

If (v_total = v_debit and v_total != v_credit) then
  UPDATE mbs_detailstest 
  SET PCredit=v_debit, PDebit=v_credit; 
end if;

MYSQL在if语句中执行存储过程或运行复杂的SET语句

1 个答案: