ColumnStore Delete

The DELETE statement is used to remove rows from tables.

1. Syntax "Syntax"

Syntax

DELETE 
 [FROM] tbl_name 
    [WHERE where_condition]
    [ORDER BY ...]
    [LIMIT row_count]

No disk space is recovered after a DELETE. TRUNCATE and DROP PARTITION can be used to recover space, or CREATE TABLE, loading only the remaining rows, then using DROP TABLE on the original table and RENAME TABLE.

LIMIT will limit the number of rows deleted, which will perform the DELETE more quickly. The DELETE ... LIMIT statement can then be performed multiple times to achieve the same effect as DELETE with no LIMIT.

The following statement deletes customer records with a customer key identification between 1001 and 1999:

DELETE FROM customer 
  WHERE custkey > 1000 AND custkey <2000

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