SELECT * FROM customers -- This is a comment WHERE city = 'New York'; 复制代码 多行注释:使用斜杠星号(/)开头,星号斜杠(/)结尾来表示注释,中间的内容将被视为注释。例如: /* This is a multi-line comment that spans across multiple lines */ SELECT * FROM customers WHERE city = 'New York...
FROM table1 -- This is a comment WHERE condition = 1 'SET@sql=REPLACE(@sql,'--.*\n','')-- Remove single line commentsSET@sql=REPLACE(@sql,'/\*.*\*/','')-- Remove multi-line commentsPRINT@sql 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 在上面...
The PL/SQL compiler ignores comments, but you should not. Adding comments to your program promotes readability and aids understanding. Generally, you use comments to describe the purpose and use of each code segment. PL/SQL supports two comment styles: single-line and multi-line. Single-Line ...
SET @g = geometry::STGeomFromText('LINESTRING(1 1 NULL 0, 2 4 NULL 12.3, 3 9 NULL 24.5)', 0); MultiLineString MultiLineString是零个或更多geometry或geographyLineString实例的集合。 如图中所示: 图1 显示的是一个简单的MultiLineString实例,其边界是其两个LineString元素的四个端点。 图2 显示的...
MultiLineString 是零个或多个 geometry 或geographyLineString 实例的集合。MultiLineString 实例下图显示了 MultiLineString 实例的示例。如图中所示:图1 显示的是一个简单的 MultiLineString 实例,其边界是其两个 LineString 元素的四个端点。 图2 显示的是一个简单的 MultiLineString 实例,因为只有 LineString ...
LineString CircularString CompoundCurve Polygon CurvePolygon MultiPoint MultiLineString MultiPolygon GeometryCollection 空间引用标识符 (SRID) 创建、构造和 geometry 实例 创建、构造和查询 geography 实例 为Nearest Neighbor 查询空间数据 空间索引概述 创建、修改和删除空间索引 ...
If the sqlcmd script contains an incorrect comment, syntax error, or is missing a scripting variable, the ERRORLEVEL returned is 1.-m error_levelControls which error messages are sent to stdout. Messages that have a severity level greater than or equal to this level are sent. When this ...
Using two dashes. In SQL Server, this indicates a single-line comment and may cause the server to ignore the remainder of the line. Using a semicolon. This indicates to SQL Server that a new command follows and can allow another query to piggyback the prior query. ...
SQL Scripts with newline separators no longer work [SPR-11560] #16184 Closed spring-projects-issues removed the type: bug label Jan 12, 2019 Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment Assignees sbrannen Labels in: data status:...
create database circle_db engine=Ordinary comment 'circle_db'; 建表:分区键 partition by、主键索引 order by 代码语言:javascript 复制 create table circle_db.bitmap_circle ( row_key String default -1, field_value_string String default -1, field_value_long Int64 default -1, field_value_double...