How To Rebuild an Index

Q

How To Rebuild an Index? - Oracle DBA FAQ - Managing Oracle Table Indexes

✍: FYIcenter.com

A

If you want to rebuild an index, you can use the "ALTER INDEX ... REBUILD statement as shown in the following SQL script:

SELECT index_name, table_name, uniqueness 
  FROM USER_INDEXES WHERE table_name = 'EMPLOYEES';
INDEX_NAME              TABLE_NAME            UNIQUENES
----------------------- --------------------- ---------
EMP_EMAIL_UK            EMPLOYEES             UNIQUE
EMP_EMP_ID_PK           EMPLOYEES             UNIQUE
EMP_DEPARTMENT_IX       EMPLOYEES             NONUNIQUE
EMP_JOB_IX              EMPLOYEES             NONUNIQUE
EMP_MANAGER_IX          EMPLOYEES             NONUNIQUE
EMP_NAME_IX             EMPLOYEES             NONUNIQUE

ALTER INDEX EMP_NAME_IX REBUILD;
Statement processed.

2007-04-27, 5533👍, 0💬

How To Recover a Dropped Index
How To Recover a Dropped Index? - Oracle DBA FAQ - Managing Oracle Table Indexes If you have the recycle bin feature turned on, dropped indexes are stored in the recycle bin. But it seems to be command to restore a dropped index out of the recycle bin. FLASHBACK INDEX is not a valid statement. See t... 2007-05-02, 8484👍, 0💬

What Happens to Indexes If You Drop a Table
What Happens to Indexes If You Drop a Table? - Oracle DBA FAQ - Managing Oracle Table Indexes If you drop a table, what happens to its indexes? The answer is that if a table is dropped, all its indexes will be dropped too. Try the following script to see yourself: CREATE TABLE student (id NUMBER(5) ... 2007-05-02, 7508👍, 0💬

What Happens to the Indexes If a Table Is Recovered
What Happens to the Indexes If a Table Is Recovered? - Oracle DBA FAQ - Managing Oracle Table Indexes If you dropped a table, and recovered it back from the recycle bin, what happens to its indexes? Are all indexes recovered back automatically? The answer is that all indexes will be recovered, if yo... 2007-05-03, 5926👍, 0💬

How To Create a New Table in Your Schema
How To Create a New Table in Your Schema? - Oracle DBA FAQ - Managing Oracle Database Tables If you want to create a new table in your own schema, you can log into the server with your account, and use the CREATE TABLE statement. The following script shows you how to create a table: >.\bin\sqlplus /... 2007-05-03, 5749👍, 0💬

How To See the Table Columns Used in an Index
How To See the Table Columns Used in an Index? - Oracle DBA FAQ - Managing Oracle Table Indexes You can a list of indexes in your schema from the USER_INDEXES view, but it will not give you the columns used in each index in the USER_INDEXES view. If you want to see the columns used in an index, you ... 2007-04-27, 5618👍, 0💬

How To Create a Single Index for Multiple Columns
How To Create a Single Index for Multiple Columns? - Oracle DBA FAQ - Managing Oracle Table Indexes If you know a group of multiple columns will be always used together as search criteria, you should create a single index for that group of columns with the "ON table_name(col1, col2, ...)" clause. He... 2007-04-27, 5576👍, 0💬

How To Rebuild an Index
How To Rebuild an Index? - Oracle DBA FAQ - Managing Oracle Table Indexes If you want to rebuild an index, you can use the "ALTER INDEX ... REBUILD statement as shown in the following SQL script: SELECT index_name, table_name, uniqueness FROM USER_INDEXES WHERE table_name = 'EMPLOYEES'; INDEX_NAME T... 2007-04-27, 5534👍, 0💬

What Is a Database Table
What Is a Database Table? - Oracle DBA FAQ - Managing Oracle Database Tables A database table is a basic unit of data logical storage in an Oracle database. Data is stored in rows and columns. You define a table with a table name, such as employees, and a set of columns. You give each column a colum... 2007-05-03, 5323👍, 0💬

Can You Drop an Index Associated with a Unique or Primary Key Constraint
Can You Drop an Index Associated with a Unique or Primary Key Constraint? - Oracle DBA FAQ - Managing Oracle Table Indexes You can not delete the index associated with a unique or primary key constraint. If you try, you will get an error like this: ORA-02429: cannot drop index used for enforcement o... 2007-05-02, 5268👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.