74a482ca7f
After this PR #9272, the `docs/build_help_zip.sh` will run failed. This PR fix this issue. But the help module still has some parse problem, I will fix it in next PR. This CL mainly changes: 1. fix `docs/build_help_zip.sh` error 2. remove `sql-reference-v2` to `sql-reference` 3. modify build extension github action to run `docs/build_help_zip.sh`
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1.9 KiB
title, language
| title | language |
|---|---|
| CREATE-VIEW | zh-CN |
CREATE-VIEW
Name
CREATE VIEW
Description
该语句用于创建一个逻辑视图 语法：
CREATE VIEW [IF NOT EXISTS]
[db_name.]view_name
(column1[ COMMENT "col comment"][, column2, ...])
AS query_stmt
说明：
- 视图为逻辑视图，没有物理存储。所有在视图上的查询相当于在视图对应的子查询上进行。
- query_stmt 为任意支持的 SQL
Example
-
在 example_db 上创建视图 example_view
CREATE VIEW example_db.example_view (k1, k2, k3, v1) AS SELECT c1 as k1, k2, k3, SUM(v1) FROM example_table WHERE k1 = 20160112 GROUP BY k1,k2,k3; -
创建一个包含 comment 的 view
CREATE VIEW example_db.example_view ( k1 COMMENT "first key", k2 COMMENT "second key", k3 COMMENT "third key", v1 COMMENT "first value" ) COMMENT "my first view" AS SELECT c1 as k1, k2, k3, SUM(v1) FROM example_table WHERE k1 = 20160112 GROUP BY k1,k2,k3;
Keywords
CREATE, VIEW