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 select_expression 

Syntax Rules for Column Descriptions

Syntax

<select_expression>

This database query is formulated in the same way as a SELECT statement, however, instead of SELECT, the keyword DATAEXTRACT or EXTRACT DB is used. All options of a SELECT statement are permitted:

·        Select the result columns and determine their order in the result table

·        Join multiple tables

·        Use qualifications to select result lines

·        Specify sort order

·        Specify locks (WITH LOCK)

Use

Use this syntax rule in a DATAEXTRACT command to specify which columns in a table to extract.

DATAEXTRACT * FROM article
OUTFIELDS
  ano       01-08
  descr     09-39
  stock     40-51
  min_ord   52-63
  price     64-74
  weight    75-85
OUTFILE 'article.data' FORMATTED

DATAEXTRACT ano,descr,stock,min_ord FROM article order by ano
OUTFIELDS
  ano       1
  descr     2
  stock     3
  min_ord   4
OUTFILE 'article.data'

DATAEXTRACT ano,descr,stock,min_ord FROM article WITH LOCK
OUTFIELDS
  ano       1
  descr     2
  stock     3
  min_rod  4
OUTFILE 'article.data'

 

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