| QUERYTRACEON <integer_value> | RECOMPILE | ROBUST PLAN | USE HINT ( <use_hint_name> [ , ...n ] ) | USE PLAN N'<xml_plan>' | TABLE HINT ( <exposed_object_name> [ , <table_hint> [ [ , ] ...n ] ] ) | FOR TIMESTAMP AS OF '<point_in_time>' } <table_hint> :...
1.前言 Text2SQL(或称NL2SQL)是一种自然语言处理技术,旨在将自然语言(Natural Language)问题转化为关系型数据库中可执行的结构化查询语言(Structured Query Language,SQL),从而实现对数据库的查询和交互。这项技术的核心目标是通过自然语言描述,无需用户具备SQL语法知识,即可完成复杂的数据库查询任务 具体来说,Text2S...
CREATE TABLE t1 (a INT, b INT, c AS a/b); CREATE UNIQUE CLUSTERED INDEX Idx1 ON t1(c); INSERT INTO t1 VALUES (1, 0); 有关详细信息,请参阅 计算列上的索引。 索引中的包含列 可以将非键列(称为包含列)添加到非聚集索引的叶级别,从而通过涵盖查询来提高查询性能。 也就是说,查询中引用...
<query_hint > ::= { { HASH | ORDER } GROUP | { CONCAT | HASH | MERGE } UNION | { LOOP | MERGE | HASH } JOIN | FAST number_rows | FORCE ORDER | MAXDOP number_of_processors | OPTIMIZE FOR ( @variable_name { UNKNOWN | = literal_constant } [ , ...n ] ) | OPTIMIZE FOR ...
history_table_name [, DATA_CONSISTENCY_CHECK = { ON | OFF } ] ) ] } Arguments database_name The name of the database in which the table is created. database_name must specify the name of an existing database. If not specified, database_name defaults to the current database. The...
For more information, seeWITH common_table_expression. NO_PERFORMANCE_SPOOL Applies to: SQL Server (starting with SQL Server 2016 (13.x)) and Azure SQL Database. Prevents a spool operator from being added to query plans (except for the plans when spool is required to guarantee valid update...
We use the following code to send out emails with query results. Transact-SQL DECLARE @tableHTML NVARCHAR(MAX) ; SET @tableHTML = N'<H3 style="font-family:verdana;color:darkblue;">Header1</H3>' + N'<H5 style="font-family:verdana;color:darkblue;">SubHeader:</H5>' + N'<H6 style...
如果需要返回事件数据,使用 XQuery value()方法而不是 query()方法。 query() 方法可在输出中返回 XML 和以“and”符转义的回车符和换行符 (CR/LF) 实例,而 value() 方法无法在输出中呈现 CR/LF 实例。 B. 创建事件数据在 DDL 触发器中的日志表 ...
This section contains latest tutorials and articles on SQL (Structure Query Language) with solved queries and other related topics.
Support SAAS complete application: cross-database query, audit, tenant sub-database, tenant sub-table and tenant data isolation Support low code + workflow (dynamic class building, dynamic table building, non-entity multi-library compatible with CRUD, JSON TO SQL, custom XML, etc.) ...