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This occurs when you try to execute a CREATE UNIQUE INDEX statement on one or more columns that contain duplicate values. Two ways to resolve (that I know of): Remove the UNIQUE keyword from your CREATE UNIQUE INDEX statement and rerun the command (i.e. if the values need not be unique).
11 Μαΐ 2021 · ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found Cause: A CREATE UNIQUE INDEX statement specified one or more columns that currently contain duplicate values. All values in the indexed columns must be unique by row to create a UNIQUE INDEX.
28 Δεκ 2019 · ORA-01452 means that the unique index that you want to impose on columns cannot be created because of duplicate keys have been found. In such moment, you have two choices, one is to create a normal index without unique key imposed on, the other is to remove duplicate keys then create it again.
Learn the cause and how to resolve the ORA-01452 error message in Oracle. You tried to execute a CREATE UNIQUE INDEX statement on one or more columns that contain duplicate values.
26 Ιουν 2023 · ORA-01452: Cannot Create Unique Index; Duplicate Keys Found (Doc ID 332494.1) Last updated on JUNE 26, 2023. Applies to: Oracle Database - Enterprise Edition - Version 8.1.7.0 to 11.2.0.3 [Release 8.1.7 to 11.2] Oracle Database Cloud Schema Service - Version N/A and later. Oracle Database Exadata Cloud Machine - Version N/A and later.
9 Σεπ 2024 · If the entries need not be unique, remove the keyword UNIQUE from the CREATE INDEX statement, then re-execute the statement. If the entries must be unique, as in a primary key, then remove duplicate values before creating the UNIQUE index.
SQL> create unique index TEST_IDX on TEST5 (EMPNO); create unique index TEST_IDX on TEST5 (EMPNO) *. ERROR at line 1: ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found. Solution: Find the duplicate rows in the table and delete them. Use below script to delete the duplicate rows.
