How many LONG columns are allowed in a table in Oracle Database

Restriction for the use of LONG columns in Oracle Databsae


1) Only one column of type LONG is allowed.

2) LONG columns cannot appear in WHERE clauses or in integrity constraints (except that they can appear in NULL and NOT NULL constraints).

3) LONG column can’t appear in GROUP BY, ORDER BY clause, UNIQUE / DISTINCT operator or CONNECT BY clause in SELECT statements.

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