How to query using special characters in Oracle

How to query using special characters in Oracle.

Here is how to query an Oracle database with special characters. First, create this test table:


Create Table A

( CO VARCHAR2(6))



Insert into A

values('12%345');



Insert into A

values('12%456');



Insert into A

values('123456');

If we want to fetch only those records that begin with '12%' and if we issue the following SQL query, it will return all the records irrespective of "%". For example:


  Select co from A

  where co like '12%%';

This query will return the following records:


  CO

  ======

  12%345

  12%456

  123456

But we only want two records in the above example, like this:


  CO

  ======

  12%345

  12%456

So, to get these results, we have to use escape:


select co from a

where co like '12\%%' escape '\';

This will return only those records that begin with "12%":


  CO

  ======

  12%345

  12%456

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This was last published in June 2002

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