IfNull function in mysql doesnt seem to work for me
IfNull function in mysql doesnt seem to work for me.... When i executed this query
select t1.dAccHeader_id,t1.dAccHeaderName,t1.dAccHeaderAcronym,
t2.dDesignationName as incharge1,
t开发者_如何学Python3.dDesignationName as incharge2,t4.dDesignationName as incharge3
from tbl_accountheader as t1
inner join tbl_designation_master as t2 on t2.dDesignation_id = t1.dPaymentIncharge_1
inner join tbl_designation_master as t3 on t3.dDesignation_id = ifnull(t1.dPaymentIncharge_2,'0')
inner join tbl_designation_master as t4 on t4.dDesignation_id = ifnull(t1.dPaymentIncharge_3,'0')
and t1.dCollege_id='1'
and t1.dIsDelete='0'
Here is my table,
Any sugesstion...
You can try using coalesce
function
inner join tbl_designation_master as t3
on t3.dDesignation_id = coalesce(t1.dPaymentIncharge_2,'0')
if your id is a number you can also remove the quote:
coalesce(t1.dPaymentIncharge_2, 0)
Check also if your t1.dPaymentIncharge_1
can be null
精彩评论