How do I shrink a table in Oracle?

How do I shrink a table in Oracle?

Row Movement The ALTER TABLE SHRINK SPACE command moves rows between existing blocks to compact the data, so before you attempt to shrink a table segment you need to enable row movement. You can check if row movement is already enabled by querying the ROW_MOVEMENT column of the [DBA|ALL|USER]_TABLES views.

What is shrink in Oracle database?

Oracle Segment Shrink Space option will consolidate the fragmented free space below the high-water mark and compact the data. The high-water mark will be moved back, and the reclaimed space will be released. After the shrink operation, data in the segment will be contained in a smaller number of blocks.

How do I Reorg a table in Oracle?

Step By Step Blueprint For Oracle Table Reorg – Index Rebuild

  1. Step1 – Stop Application.
  2. Step2 – Login To The Database.
  3. Step3 – Run PRE-Checks.
  4. Step4 – Generate Reorg Scripts.
  5. Step5 – Rename Tablespaces To _OLD.
  6. Step6 – Create New Tablespaces.
  7. Step7 – Run the maintenance scripts.
  8. Step8 – Verify Index Status.

How do I shrink a table in SQL Server?

Use SQL Server Management Studio

  1. In Object Explorer, connect to an instance of the SQL Server Database Engine, and then expand that instance.
  2. Expand Databases, and then right-click the database that you want to shrink.
  3. Point to Tasks, point to Shrink, and then select Database. Database.
  4. Select OK.

What is Alter Table move in Oracle?

The move_table_clause lets you relocate data of a nonpartitioned table or of a partition of a partitioned table into a new segment, optionally in a different tablespace, and optionally modify any of its storage attributes.

How do I check the progress of a shrink table?

Check progress and status of alter Shrink Space command

  1. Check the Size of Segment on which its running: select sum(bytes)/1024/1024/1024 from dba_segments where segment_name = ‘EMPLOYEE’;
  2. Enable the row movement and shrink command: — Enable row movemement command.
  3. Check the progress of Alter Shrink Space Command.

How do you reorg a table?

For a clustering REORG, an index scan is used to reorder table records. Reorganize table rows by accessing the table through an index. The default method is to scan the table and sort the result to reorganize the table by using temporary table spaces as necessary.

How do you resize a column to best fit?

Adjust Table Columns in Word (Auto Fit)

  1. Click anywhere in the table.
  2. In “Table Tools” click the [Layout] tab > locate the “Cell Size” group and choose from of the following options: To fit the columns to the text (or page margins if cells are empty), click [AutoFit] > select “AutoFit Contents.”