September 2004
Beginner to intermediate
388 pages
6h 34m
English
Content preview from PROC SQL: Beyond the Basics Using SAS®
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6.5. Summary
Data Definition Language (DDL) statements provide programmers with a way to redefine the definition of one or more existing tables (see section 6.2).
As one or more new columns are added to a table, each is automatically added at the end of a table’s descriptor record (see section 6.2.1).
To add one or more columns in a designated order, the SQL standard provides a couple of choices to choose from (see section 6.2.2).
PROC SQL enables a character column (but not a numeric column) to have its length changed (see section 6.2.3).
A column’s format and label information can be modified with a MODIFY clause (see sections 6.2.4 and 6.2.5).
The RENAME= SAS data set option must be used in a FROM clause to rename column names (see section 6.2.6 ...
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