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How do I delete unmatched records between two tables

Posted on 2008-10-08
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Last Modified: 2013-11-27
I have two tables, table1 and table 2.  Table 2 has some records that are not in Table 1. I need to delete those records from table 1 so both tables contain only same records. in the example deleting records 2 and 4 from Table2. I have close to 100K records, hence diut it manuuly is out of a question.

TABLE1.ID             TABLE2.ID
1                             1
3                             2
5                             3
                               4
                               5

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Question by:RalphyC
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Guy Hengel [angelIII / a3] earned 250 total points
ID: 22669608
this should do:
DELETE * FROM Table2
WHERE ID NOT IN (SELECT ID FROM TABLE1)

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