SQL NULLIF
NULLIF kullanımı . . . CREATE TABLE #tmpTable ( Id int, CustomerName varchar(50), identification_number varchar(11), tax_number varchar(10) ) GO INSERT #tmpTable VALUES(1,'Firma A', '12345678912', '9876543213'); INSERT #tmpTable VALUES(2,'Firma B', '', '4568529873'); INSERT #tmpTable VALUES(3,'Firma...
