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query to get unmatched data from two tables in sql
i have two tables named table-1 "Census" which have columns like "Emiscode,School_name,Uc_name" and table-2 "School_info" which have columns like "Emiscode,school_name,inspect_Date,uc_name" table-1 fields are permanent table-2 fields are updates for every month for example table-1 have 100 records and table-2 have 70 records for the month of january 2013 i want unmatched 30 records from table-1 those not update/inspected in the month of January 2013
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