在SQL中包含NULL行

Question

尝试运行SQL查询以针对EAN显示标识符值。

如果EAN不存在，我如何返回标识符的NULL值？所以我在查询列表，我必须先看看EAN是否存在并返回标识符。如果它不存在，以得到一个空记录

查询低于

select Identifier,EAN from StarProduct 
WHERE EAN ='98132361069' 
OR EAN ='98132361069' 
OR EAN ='98132361052' 
OR EAN ='3605540854600' 
OR EAN ='3605540853764' 
OR EAN ='716170075020' 
OR EAN ='716170075013' 
OR EAN ='716170060699' 
OR EAN ='716170060682' 
OR EAN ='716170060651' 
OR EAN ='716170060613' 
OR EAN ='716170060606' 
OR EAN ='716170060590' 
OR EAN ='716170060583' 
OR EAN ='716170060576' 
OR EAN ='716170060569' 
OR EAN ='716170060552' 
OR EAN ='3348901219549' 
OR EAN ='3348901219532' 
OR EAN ='3348901219525' 
OR EAN ='3348901219518' 
OR EAN ='3348901219501' 
OR EAN ='3348901219495' 
OR EAN ='3348901219488' 
OR EAN ='3348901219471' 
OR EAN ='3348901219464' 
OR EAN ='3348901219457' 
OR EAN ='3348901219440' 
OR EAN ='3348901219426' 
OR EAN ='3348901190572' 
OR EAN ='3348901190565' 
OR EAN ='3348901190558' 
OR EAN ='3348901103435' 
OR EAN ='3348900574915' 
OR EAN ='3380814020010' 
OR EAN ='20714404628' 
OR EAN ='20714324636' 
OR EAN ='3395015360018' 
OR EAN ='3395015360025' 
OR EAN ='3395015360001' 
OR EAN ='85805033552' 
OR EAN ='85805142728' 
OR EAN ='85805142698' 
OR EAN ='3605522108011' 
OR EAN ='3605522023482' 
OR EAN ='3605522023420' 
OR EAN ='3605522023369' 
OR EAN ='3605522023307' 
OR EAN ='3605522023246' 
OR EAN ='3360372026136' 
OR EAN ='3605521752710' 
OR EAN ='3605521403971' 
OR EAN ='3605521403919' 
OR EAN ='3360372026143' 
OR EAN ='3605521907844' 
OR EAN ='3605521907783' 
OR EAN ='3605521907721' 
OR EAN ='3605521907660' 
OR EAN ='3605521849953' 
OR EAN ='3605521849717' 
OR EAN ='3605521849656' 
OR EAN ='3605521849533' 
OR EAN ='3605521849472' 
OR EAN ='3605521849410' 
OR EAN ='236378525818' 
OR EAN ='3605533273807' 
OR EAN ='3605533273623' 
OR EAN ='3605533273388' 
OR EAN ='3605532697253' 
OR EAN ='3600520932903' 
OR EAN ='3600520772042' 
OR EAN ='773602181766' 
OR EAN ='773602168484' 
OR EAN ='773602168422' 
OR EAN ='773602168408' 
OR EAN ='773602168385' 
OR EAN ='773602168446' 
OR EAN ='773602168507' 
OR EAN ='773602168491' 
OR EAN ='773602181759' 
OR EAN ='773602264452' 
OR EAN ='773602340767' 
OR EAN ='773602340750' 
OR EAN ='773602340743' 
OR EAN ='773602340736' 
OR EAN ='773602335671' 
OR EAN ='773602311576' 
OR EAN ='773602310920' 
OR EAN ='773602298037' 
OR EAN ='773602298020' 
OR EAN ='773602298013' 
OR EAN ='773602298006' 
OR EAN ='773602297993' 
OR EAN ='773602297986' 
OR EAN ='773602297979' 
OR EAN ='773602297962' 
OR EAN ='773602297955' 
OR EAN ='773602297948' 
OR EAN ='773602297931' 
OR EAN ='773602297924' 
OR EAN ='773602297917' 
OR EAN ='773602297900' 
OR EAN ='773602297894' 
OR EAN ='773602297887' 
OR EAN ='773602220007' 
OR EAN ='773602219995' 
OR EAN ='773602219971' 
OR EAN ='7330051126064' 
OR EAN ='7330051126040' 
OR EAN ='7330051126033' 
OR EAN ='7330051126026' 
OR EAN ='7330051126057' 
OR EAN ='7330051126071' 
OR EAN ='4084500159297' 
OR EAN ='4084500159068' 
OR EAN ='4084500158757' 
OR EAN ='4084500158603' 
OR EAN ='4084500158559' 
OR EAN ='4973167960110' 
OR EAN ='4973167969717' 
OR EAN ='4973167902820' 
OR EAN ='4973167902813' 
OR EAN ='4973167902806' 
OR EAN ='4973167902790' 
OR EAN ='730852112056' 
OR EAN ='730852112032' 
OR EAN ='730852112001' 
OR EAN ='730852110083' 
OR EAN ='730852111967' 
OR EAN ='730852111936' 
OR EAN ='730852111905' 
OR EAN ='3365440158078' 
OR EAN ='3365440775411' 
OR EAN ='3365440676152' 
OR EAN ='3365440676091' 
OR EAN ='3365440676039' 
OR EAN ='3365440675971' 
OR EAN ='3365440675919' 
OR EAN ='3365440675797' 
OR EAN ='3365440675735' 
OR EAN ='3365440675674' 
OR EAN ='3365440675612' 
OR EAN ='3365440675490' 
OR EAN ='3365440675254' 
OR EAN ='85805172770' 
OR EAN ='85805172787' 
OR EAN ='85805172817' 
OR EAN ='85805172831' 
OR EAN ='85805172886' 
OR EAN ='85805172893' 
OR EAN ='85805172916' 
OR EAN ='98132375356' 
OR EAN ='98132391578' 
OR EAN ='3380814066018' 
OR EAN ='3380814065813' 
OR EAN ='3380814065714' 
OR EAN ='3380814065615' 
OR EAN ='3380814065516' 
OR EAN ='3380814065318' 
OR EAN ='3380814066216' 
OR EAN ='3380814071111' 
OR EAN ='3380814071913' 
OR EAN ='3380814071814' 
OR EAN ='3380814071616' 
OR EAN ='3380814071715' 
OR EAN ='3380814071517' 
OR EAN ='3380814071418' 
OR EAN ='3380814071319' 
OR EAN ='3380814071210' 
OR EAN ='3380814072217' 
OR EAN ='20714711856' 
OR EAN ='20714711894' 
OR EAN ='20714711900' 
OR EAN ='20714711924' 
OR EAN ='20714711979' 
OR EAN ='33489' 
OR EAN ='3348901248075' 
OR EAN ='3348901250849' 
OR EAN ='3348901248099' 
OR EAN ='3348901248112' 
OR EAN ='3348901248105' 
OR EAN ='3348901248334' 
OR EAN ='3348901248358' 
OR EAN ='3348901248365' 
OR EAN ='3348901248228' 
OR EAN ='3348901248235' 
OR EAN ='3348901248259' 
OR EAN ='27131564027' 
OR EAN ='27131564010' 
OR EAN ='27131533023' 
OR EAN ='27131514213' 
OR EAN ='27131513308' 
OR EAN ='27131513292' 
OR EAN ='27131513285' 
OR EAN ='27131513261' 
OR EAN ='27131513254' 
OR EAN ='27131187066' 
OR EAN ='3401561313061' 
OR EAN ='7317851142180' 
OR EAN ='7317851142166' 
OR EAN ='7317851142128' 
OR EAN ='7317851142203' 
OR EAN ='7317851142104' 
OR EAN ='7317851142142' 
OR EAN ='236344958640' 
OR EAN ='236344958633' 
OR EAN ='236344958626' 
OR EAN ='236344958619' 
OR EAN ='236344958558' 
OR EAN ='7611773150019' 
OR EAN ='7611773150002' 
OR EAN ='7611773150026' 
OR EAN ='7611773150071' 
OR EAN ='7611773150064' 
OR EAN ='7611773150057' 
OR EAN ='7611773150040' 
OR EAN ='7611773150033' 
OR EAN ='7611773186599' 
OR EAN ='7611773186643' 
OR EAN ='7611773186636' 
OR EAN ='7611773186629' 
OR EAN ='7611773186612' 
OR EAN ='7611773186605' 
OR EAN ='4935421601856' 
OR EAN ='4935421601924' 
OR EAN ='4935421601900' 
OR EAN ='4935421601894' 
OR EAN ='4935421601870' 
OR EAN ='4935421601931' 
OR EAN ='6412600842531' 
OR EAN ='6412600842630' 
OR EAN ='6412600842647' 
OR EAN ='6412600842623' 
OR EAN ='6412600842616' 
OR EAN ='3600531117085' 
OR EAN ='3600531117108' 
OR EAN ='3600531117092' 
OR EAN ='3600531117061' 
OR EAN ='3600530898367' 
OR EAN ='3600530968176' 
OR EAN ='3600530968169' 
OR EAN ='3600530968183' 
OR EAN ='717334068087' 
OR EAN ='607710002418' 
OR EAN ='607710002425' 
OR EAN ='607710002463' 
OR EAN ='607710034808' 
OR EAN ='607710034785' 
OR EAN ='607710034815' 
OR EAN ='607710039186' 
OR EAN ='607710039179' 
OR EAN ='607710039162' 
OR EAN ='607710039155' 
OR EAN ='607710039148' 
OR EAN ='607710039131' 
OR EAN ='607710039124' 
OR EAN ='607710039117' 
OR EAN ='607710039100' 
OR EAN ='607710039094' 

Answer 1

要返回NULL值，你可以使用一个left join。一个典型的方法是：

select sp.Identifier, n.EAN 
from (select '98132361069' as EAN union all 
     . . . 
    ) n left join 
    StarProduct sp 
    on sp.EAN = n.EAN; 

如果EAN是清单已经从查询的到来，那么就比较容易包括查询n而不是名单。