Yahoo Poland Wyszukiwanie w Internecie

Zaloguj się

Search results

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

    Learn how to create a unique index in Oracle to prevent duplicate values in the indexed column or columns of a table. See examples of single and multiple column unique indexes, and how they differ from primary key and unique constraints.

    • Create Index

      In this tutorial, you will learn how to use the Oracle...

  2. blogs.oracle.com › sql › postHow to Create and Use Indexes in Oracle Database - Oracle Blogs

    10 sie 2017 · When you create a primary key or unique constraint, Oracle Database will automatically create a unique index for you (assuming there isn't an index already available). In most cases you'll add the constraint to the table and let the database build the index for you.

  3. docs.oracle.com › en › databaseCREATE INDEX - Oracle Help Center

    You create an index on a nested table column by creating the index on the nested table storage table. Include the NESTED_TABLE_ID pseudocolumn of the storage table to create a UNIQUE index, which effectively ensures that the rows of a nested table value are distinct.

  4. asktom.oracle.com › ords › asktomunique index - Ask TOM - Oracle Ask TOM

    1 lis 2013 · Find out how to create and use unique indexes in Oracle databases, and how they differ from unique constraints. Read the explanations, examples, and comments from experts and users on various topics related to unique indexes.

  5. www.techonthenet.com › oracle › indexesOracle / PLSQL: Indexes - TechOnTheNet

    The syntax for creating an index in Oracle/PLSQL is: CREATE [UNIQUE] INDEX index_name. ON table_name (column1, column2, ... column_n) [ COMPUTE STATISTICS ]; UNIQUE. It indicates that the combination of values in the indexed columns must be unique. index_name. The name to assign to the index. table_name.

  6. www.oracletutorial.com › oracle-index › oracle-create-indexOracle CREATE INDEX - Creating Indexes for One or More Columns

    In this tutorial, you will learn how to use the Oracle CREATE INDEX statement to create a new index on one or more columns of a table.

  7. www.geeksforgeeks.org › pl-sql-unique-indexPL/SQL Unique Index - GeeksforGeeks

    3 dni temu · A PL/SQL Unique Index is a powerful database object used to ensure the uniqueness of values in one or more columns of a table. In Oracle databases, indexes play an important role in enhancing query performance by enabling quick retrieval of rows.. The unique index specifically enforces a rule that no two rows in a table can have the same values for the indexed column(s).

  1. Wyszukiwania związane z create unique index oracle

    create unique index oracle sql