根据多个条件，将记录从一个表中的特定列插入到另一表中

Question

I'm Using SQL server and need to Inset records from one table into another empty table. the first table im pulling from is called accnt and has the fields: code, invno, invdate, ven, and amnt, and imported. the table that the records are going to is called quick and has the fields: date, num, name, account, split, and amount. some of the fields are just directly copied which i understand, but what im having trouble with is that some of the fields need to be populated with a different field from accnt depending on the value in account. and there is a field in accnt called imported that is either empty or has an x in it. i only want to import records where the imported field is empty

the insert statement i have so far should import: date, name, account, and amount directly not depending on the anything. But the num field imports from a different field in accnt depending on the value of the accno field. the criteria is:

if account < 7000 then num = code if account > 7000 then num = invno

here is what i tried, but it didnt work

DELETE FROM quick
INSERT INTO quick (date, num, name, account, amount) 
if accnt.accno < '7000'
   then SELECT invdate, code, ven, accno, amnt from accnt
if accnt.accno > '7000'
   then SELECT invdate, invno, ven, accno, amnt from accnt

how do i accomplish what i'm trying to do? the table looks like this even though the data in the picture is wrong:

the type and split fields will be populated later with an update query.

Answer 1

Try it with a single SELECT and use CASE to separate the two situations.

DELETE FROM quick
INSERT INTO quick (date, num, name, account, amount) 
SELECT invdate,
case when accnt.accno < '7000' then code else invno end
, ven, accno, amnt from accnt