更确切的说,表变量可以被当成正常的表或者表表达式一样在SELECT,DELETE,UPDATE,INSERT语句中使用,但是表变量不能在类似"SELECT select_listINTOtable_variable"这样的语句中使用。而在SQL Server2000中,表变量也不能用于INSERTINTOtable_variable EXEC stored_procedure这样的语句
DECLARE @local_variable table (FID int identity(1,1),ReferenceID varchar(20)) insert into @local_variable (ReferenceID) select top 100000 ReferenceID from chineseresume order by updatedate select * from @local_variable where Fid > 40 and fid <= 60 end 的不同 begin create table #temp (F...
对于临时表,同样是1行数据,来驱动物理表TestTableVariable,就可以正常使用到index seek,而表变量不行? 再就是,对于TestTableVariable表上的统计信息,经过几个SQL查询过后,触发了统计信息的更新,统计信息也相对准确地预估到了999999行为null,1行是一个特定的值XX156876) 1,对于物理表TestTableVariable与表变量的join,...
例如: SQL 复制 USE AdventureWorks2022; GO DECLARE @mycol nvarchar(20) ; SET @mycol = 'Name'; EXECUTE ('SELECT ' + @mycol + ' FROM Production.Product;') ; 另请参阅 EXECUTE (Transact-SQL) SET 语句 (Transact-SQL) DECLARE @local_variable (Transact-SQL)...
const sql = require('mssql') sql.on('error', err => { // ... error handler }) sql.connect(config).then(pool => { // Query return pool.request() .input('input_parameter', sql.Int, value) .query('select * from mytable where id = @input_parameter') }).then(result => { ...
[ <triggered when clause> ] <triggered SQL statement> ... Syntax Rules Let OR, OT, NR, and NT be the <old transition variable name>, <old transition table name>, <new transition variable name>, and <new transition table name>, respectively. ... If neither FOR EACH ROW no...
discussion of CCI is beyond the scope of this documentation, but generally it uses high compression to dramatically improve search speeds. It is not compatible with a table primary key or a non-columnstore clustered index, and supporting(max)length character-data columns requires SQL 2017 or ...
Subclause 6.4, "<value specification> and <target specification>": <indicator variable> ::= [ INDICATOR ] <embedded variable name> <indicator parameter> ::= [ INDICATOR ] <host parameter name> ... Conformance Rules Without Feature F611, "Indicator data types", in conforming SQL ...
2.1.168 Section 7.2, Index Structure 2.1.169 Section 7.2.1, Index Source 2.1.170 Section 7.2.2, Index Body Section 2.1.171 Section 7.2.3, Index Title Section 2.1.172 Section 7.3, Table Of Content 2.1.173 Section 7.3.1, Table of Content Source 2.1.174 Section 7.3.2, Table ...
14、TDSQL for PostgreSQL(原 TBase)数据库 其它不再列举。 15、MogDB数据库 16、OushuDB数据库 其它不再列举。 17、PolarDB_for_PG数据库 其它不再列举。 18、神通数据库 其它不再列举。 19、南大通用GBase 这里只列出部分结果,其它的详细内容可以参考:https://share.weiyun.com/5lb2U2M ...