mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-29 13:10:48 +00:00
25 lines
1.2 KiB
Markdown
25 lines
1.2 KiB
Markdown
---
|
||
toc_priority: 60
|
||
toc_title: IN Operator
|
||
---
|
||
|
||
# Functions for Implementing the IN Operator {#functions-for-implementing-the-in-operator}
|
||
|
||
## in, notIn, globalIn, globalNotIn {#in-functions}
|
||
|
||
See the section [IN operators](../../sql-reference/operators/in.md#select-in-operators).
|
||
|
||
## tuple(x, y, …), operator (x, y, …) {#tuplex-y-operator-x-y}
|
||
|
||
A function that allows grouping multiple columns.
|
||
For columns with the types T1, T2, …, it returns a Tuple(T1, T2, …) type tuple containing these columns. There is no cost to execute the function.
|
||
Tuples are normally used as intermediate values for an argument of IN operators, or for creating a list of formal parameters of lambda functions. Tuples can’t be written to a table.
|
||
|
||
## tupleElement(tuple, n), operator x.N {#tupleelementtuple-n-operator-x-n}
|
||
|
||
A function that allows getting a column from a tuple.
|
||
‘N’ is the column index, starting from 1. N must be a constant. ‘N’ must be a constant. ‘N’ must be a strict postive integer no greater than the size of the tuple.
|
||
There is no cost to execute the function.
|
||
|
||
[Original article](https://clickhouse.tech/docs/en/query_language/functions/in_functions/) <!--hide-->
|