Microsoft OLE DB 2.0 Programmers Reference and Data Access SDK (Microsoft Professional Editions)
| OLE DB Programmer's Reference |
The construct of the tuple value expression is as follows:
<tuple_value_expression> ::= <set>.CURRENTMEMBER | <set>[.ITEM]({<string_value_expression> [, <string_value_expression>...]} | <index>)
The following table describes the tuple value expressions.
| Element | Description |
|---|---|
| <set>.CURRENTMEMBER | Gives the current tuple in <set>. The concept of "currency" occurs in functions such as GENERATE, where the semantics include some form of iteration through tuples of a set. |
| <set>[.ITEM](<string_expression> [, <string_expression>...] | <index>) | Returns a tuple from <set>. The <string_expression> [, <string_expression>...] specifies which tuple to retrieve. The <index> value specifies the position of the tuple in <set>. The numbering of the tuples is zero-based. |
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