The preceding syntax is said to create the table variable inline. The inline syntax doesn't support memory-optimization. So let us convert the inline syntax to the explicit syntax for the TYPE. Scope: The TYPE
For more information, see Table variable deferred compilation. Indexes can't be created explicitly on table variables, and no statistics are kept on table variables. Starting with SQL Server 2014 (12.x), new syntax was introduced which allows you to create certain index types inline with the ...
The syntax is as follows: “DECLARE @Temporary TABLE (an INT).” You can also populate a table variable with INSERT statements in the same manner that you would do for a stored table. Creating Temporary Tables Using the “INTO” Clause The appeal of the “INTO” clause is that when you...
The table definition of a table variable cannot change after the DECLARE statement. Any ALTER TABLE query attempting to alter a table variable will fail with a syntax error. Along the same lines, you cannot use a table variable with SELECT INTO or INSERT EXEC queries. f you are using a ta...
由於SQL Server 查詢最佳化工具通常會選擇最好的查詢執行計畫,因此,建議資深開發人員與資料庫管理員只在必要情況使用提示。 適用於: 刪除 插入 選擇 更新 合併 Transact-SQL 語法慣例 語法 syntaxsql 複製 <query_hint> ::= { { HASH | ORDER } GROUP | { CONCAT | HASH | MERGE } UNION | { LOOP |...
有关语法的详细信息,请参阅 CREATE TABLE (Transact-SQL) 、CREATE FUNCTION (Transact-SQL) 和DECLARE @local_variable (Transact-SQL)。 collation_definition 由Microsoft Windows 区域设置和比较样式、Windows 区域设置和二进制表示法或 Microsoft SQL Server 排序规则组成的列的排序规则。 如果未指定 collation_defin...
由于SQL Server 查询优化器通常为查询选择最佳执行计划,因此我们建议仅使用提示作为经验丰富的开发人员和数据库管理员的最后手段。 适用于: 删除 插入 选择 更新 合并 Transact-SQL 语法约定 语法 syntaxsql复制 <query_hint>::={ {HASH|ORDER}GROUP| {CONCAT|HASH|MERGE}UNION| {LOOP|MERGE|HASH}JOIN|D...
SQL Server 和 Azure SQL 数据库 的语法。 syntaxsql 复制 { constant | scalar_function | [ table_name. ] column | variable | ( expression ) | ( scalar_subquery ) | { unary_operator } expression | expression { binary_operator } expression | ranking_windowed_function | aggregate_windowed_fu...
Syntax The following syntax is for SQL Server and Azure SQL Database: syntaxsql DECLARE{ { @local_variable[AS]data_type[ = value ] } | { @cursor_variable_nameCURSOR} } [ ,...n ] | { @table_variable_name[AS]<table_type_definition>}<table_type_definition>::=TABLE( {<column_defini...
syntaxsql 复制 -- Syntax for SQL Server and Azure SQL Database [ WITH <common_table_expression> [...n] ] UPDATE [ TOP ( expression ) [ PERCENT ] ] { { table_alias | <object> | rowset_function_limited [ WITH ( <Table_Hint_Limited> [ ...n ] ) ] } | @table_variable } ...