sql - what's wrong in my query? - 


@tablen1 varchar(32), @tablen2 varchar(32) declare @sqlcommand varchar(1000) declare @table1 varchar(max) declare @table2 varchar(max) declare @table3 varchar(max) set @table1 = @tablen1 set @table2 = @tablen2 set @table3 = 'ab_dispensing' set @sqlcommand = 'select ' +@table1+'.atm_id,'+@table1+'.le,'+@table2+'.le,'+@table3+'.dispensed''    '+@table1+','+@table2+','+@table3+'  '+@table1+'.atm_id = '+@table2+'.atm_id''''and''' +@table3+'.atm_id = '+@table1+'.atm_id'     exec (@sqlcommand)

when run query : 

exec ab_dif _3_0_pm_14_may,_3_2_pm_14_may

i message

incorrect syntax near 'ab_dispensing'.

it's handy print dynamic sql , check if valid.

if pass 't1' , 't2' input code , print @sqlcommand get:

select t1.atm_id,t1.le,t2.le,ab_dispensing.dispensed'    t1,t2,ab_dispensing  t1.atm_id = t2.atm_id''and'ab_dispensing.atm_id = t1.atm_id

notice ' causing sql invalid. need remove unnecessary ' used in .dispensed'' , ''''and'''

this sql should be.

declare @tablen1 varchar(32) = 't1', @tablen2 varchar(32) = 't2'  declare @sqlcommand varchar(1000) declare @table1 varchar(max) declare @table2 varchar(max) declare @table3 varchar(max) set @table1 = @tablen1 set @table2 = @tablen2 set @table3 = 'ab_dispensing' set @sqlcommand = 'select ' +@table1+'.atm_id,'+@table1+'.le,'+@table2+'.le,'+@table3+'.dispensed    '+@table1+','+@table2+','+@table3+'  '+@table1+'.atm_id = '+@table2+'.atm_id , ' +@table3+'.atm_id = '+@table1+'.atm_id' --print @sqlcommand     exec (@sqlcommand)

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