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  1. stackoverflow.com › questions › 25504691ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found

    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).

  2. ittutorial.org › ora-01452-cannot-create-unique-index-duplicate-keys-foundORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found

    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.

  3. www.howtosop.com › how-to-resolve-ora-01452-cannot-create-unique-index-duplicateHow to Resolve ORA-01452: cannot CREATE UNIQUE INDEX; duplicate...

    28 Δεκ 2019 · Solution. Suppose that you want COL1 and COL2 to form a unique key, we use Oracle group function COUNT to find duplicate keys. Please see the following example. SQL> select * from (select col1, col2, count(*) cnt from erpapp.billings group by col1, col2 ) where cnt > 1 order by cnt desc; COL1 COL2 CNT.

  4. www.oracletutorial.com › oracle-index › oracle-unique-indexOracle UNIQUE Index - Oracle Tutorial

    A unique index ensures that no two rows of a table have duplicate values in the indexed column (or columns). A non-unique index does not impose this restriction on the indexed column’s values. To create a unique index, you use the CREATE UNIQUE INDEX statement: CREATE UNIQUE INDEX index_name ON table_name(column1[,column2,...]);

  5. www.techonthenet.com › oracle › errorsOracle / PLSQL: ORA-01452 Error Message - TechOnTheNet

    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.

  6. dbaclass.com › article › ora-01452-cannot-create-unique-index-duplicate-keys-foundORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found

    ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found. While creating unique index on a table , got below error. Solution: Find the duplicate rows in the table and delete them. Use below script to delete the duplicate rows. REM a table. prompt Enter name(s) of column(s) which should be unique. If more than.

  7. docs.oracle.com › en › error-helpORA-01452 - Database Error Messages - Oracle

    9 Σεπ 2024 · A CREATE UNIQUE INDEX statement specified one or more columns that currently contained duplicate values. All values in the indexed columns must be unique by row to create a UNIQUE INDEX. Action. If the entries need not be unique, remove the keyword UNIQUE from the CREATE INDEX statement, then re-execute the statement.