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Don Burleson Blog 







Maximum number of values in SQL IN operator list

 Oracle Database Tips by Donald BurlesonJune 15, 2015

Question:  I need to insert a very long list of values into a SQL SELECT statement.  How many IN Lists values are supported by Oracle?

select first_name from emp where last_name IN ('A', 'B', . . . . . . '');

How many values we can pass with IN operator.

Answer:  Oracle allows up to 1,000 IN list values in a SQL statement.  However, using a long IN list may not be the most efficient way of processing such a query.

Instead, don't write your SQL with a long "IN" Lost. Instead, write the list to a global temporary table and join into the GTT:

You can also load the IN List" values into a PL/SQL collection and process this array as-if it was an Oracle table.

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