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THEN percent-result PERCENT [ROWS]
[WHEN condition THEN percent-result PERCENT [ROWS]]...
[ELSE percent-result PERCENT [ROWS]] END
rows-size is:
number-rows ROWS
| BALANCE WHEN condition THEN number-rows ROWS
[WHEN condition THEN number-rows ROWS]...
[ELSE number-rows ROWS] END
transpose-set is:
transpose-item-list AS transpose-col-list
transpose-item-list is:
expression-list | (expression-list) [,(expression-list)]...
expression-list is:
expression [,expression]...
transpose-col-list is:
colname | (colname-list)
colname-list is:
colname [,colname]...
Syntax Description of SELECT
[col-expr]
is an SQL value expression. It can be a column, an arithmetic expression, a function (excluding
aggregate functions), a CASE expression, or a CAST expression.
[ANY N] | [FIRST N]
specifies that N rows are to be returned (assuming the table has at least N rows and that the
qualification criteria specified in the WHERE clause, if any, would select at least N rows) and
you do not care which N rows are chosen (out of the qualified rows) to actually be returned.
You must enclose ANY N or FIRST N in square brackets. [FIRST N] is different from [ANY
N] only if you use ORDER BY on any of the columns in the select list to sort the result table
of the SELECT statement. N is an unsigned numeric literal with no scale. If N is greater than
the number of rows in the table, all rows are returned. [ANY N] and [FIRST N] are
disallowed in nested SELECT statements and on either side of a UNION operation.
ALL | DISTINCT
specifies whether to retrieve all rows whose columns are specified by the select-list
(ALL) or only rows that are not duplicates (DISTINCT). Nulls are considered equal for the
purpose of removing duplicates. The default is ALL.
select-list
specifies the columns or column expressions to select from the table references in the FROM
clause.
*
specifies all columns in a table, view, joined table, or derived table determined by the
evaluation of a query expression, as specified in the FROM clause.
corr.*
specifies all columns of specific table references by using the correlation name corr of
the table references, as specified in the FROM clause. See
corr.single-col [[AS] name]
specifies one column of specific table references by using the correlation name of the table
reference, as specified in the FROM clause.
single-col [[AS] name]
specifies a column.
col-expr [[AS]name]
specifies a derived column determined by the evaluation of an SQL value expression in
the list. By using the AS clause, you can associate a derived column with a name.
See the discussion of limitations in
144
SQL Statements
"Considerations for Select List" (page
"Correlation Names" (page
153).
194).
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