sql server - Delete if record exists and Insert if record doesn't exist -


in loop, i'm writing insert , delete query following:

in case if checkbox not check check if record exist & if exist delete. if doesn’t exist don’t anything.

if checkbox check check if record exist & if exist don’t if doesn’t exist insert it.

i need check on whether queries, subqueries execute or return error because i'm writing without wanting change database right now.

for each odatagriditem in valgrid2.items         chk = odatagriditem.findcontrol("checkbox1")         rn = odatagriditem.findcontrol("lblrptname")         rid = odatagriditem.findcontrol("lblreportid")         if chk.checked = true             rpti = ctype(odatagriditem.findcontrol("lblreportid"), label).text              'valsql2 = "insert companyreportlisttable(companyid, reportid) values (valcompanyid, rpti) not exists(select * companyreportlisttable reportid <> rpti , companyid <> valcompanyid , " & chk.checked & "= 1)"             'if exists don’t             'valsql2 = valsq2 & ";if reportid = rpti , companyid = valcompanyid begin companyid = companyid , reportid = reportid end"              'to nothing, i'd equal parameter's value column name              count += 1             rptn = ctype(odatagriditem.findcontrol("lblrptname"), label).text             oexargs.add(rptn)             response.write(rpti + " - " + rptn + "<br/>")         else             'valsql2 = valsq2 & ";delete companyreportlisttable exists(select * companyreportlisttable reportid = rpti , companyid = valcompanyid and" & chk.checked & " = 0)"             'if doesn't exist don’t             'valsql2 = valsq2 & ";if reportid <> rpti , companyid <> valcompanyid begin companyid = companyid , reportid = reportid end"           end if 

valsql2 = "insert companyreportlisttable(companyid, reportid) values (valcompanyid, rpti) not exists(select * companyreportlisttable reportid <> rpti , companyid <> valcompanyid , " & chk.checked & "= 1)"

in code " & chk.checked & "= 1)"will give error . true =1 not support in sql .


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