syntaxsql [WITH<common_table_expression>[ , ...n ] ]SELECT<select_criteria>[ ; ]<select_criteria>::=[TOP(top_expression) ] [ALL|DISTINCT] { * |column_name| expression } [ , ...n ] [FROM{table_source} [ , ...n ] ] [WHERE<search_condition>] [GROUPBY<group_by_clause>] [HA...
A four-part name constructed with theOPENDATASOURCEfunction as the server-name part can be used as a table source wherever a table name can appear in aSELECTstatement. A four-part name can't be specified for Azure SQL Database. Some syntax restrictions apply toSELECTstatements that involve rem...
field_name udt_column_name 的公共数据成员。 method_name 带一个或多个参数的 udt_column_name 的公共方法。 method_name 不能是赋值函数方法。 以下示例通过调用名为Location类型的方法,从point表中选择Cities列的值(定义为Distance类型): SQL CREATETABLEdbo.Cities (NameVARCHAR(20), StateVARCHAR(20), Locat...
USING (SELECT OWNER, OBJECT_NAME, MAX(ID) ID from T GROUP BY OWNER, OBJECT_NAME) T ON (T.OWNER = T1.OWNER AND T.OBJECT_NAME = T1.TABLE_NAME) WHEN MATCHED THEN UPDATE SET = WHEN NOT MATCHED THEN INSERT VALUES (, T.OWNER, T.OBJECT_NAME); SELECT ID, OWNER, OBJECT_NAME, OBJECT...
SQL USEAdventureWorks2022; GO IF OBJECT_ID('dbo.Gloves', 'U') IS NOT NULLDROPTABLEdbo.Gloves; GO-- Create Gloves table.SELECTProductModelID,NameINTOdbo.GlovesFROMProduction.ProductModelWHEREProductModelIDIN(3,4); GO-- Here is the simple union.USEAdventureWorks2022; GOSELECTProductModelID,Name...
#temp_tablename | ##temp_tablename – The name you assign to the temporary table. You should follow the naming rules in SQL Server when giving names to temporary tables. Prefix them with # or ## to indicate local or global temporary tables. ...
However, if tables have the same columns, then you need to specify full column names like table_name.column_name in the SELECT query. The following selects columns from two tables. SQL Script: Select Data From Multiple Tables Copy SELECT * FROM Employee, Deparatment; SELECT Employee.*, ...
INTO new_table_name 指定結果集是用來建立新的資料表。new_table_name 指定新的資料表名稱。 FROM table_list 包含一組結果集資料擷取來源的資料表清單。這些來源可以是: 執行SQL Server 的本機伺服器上的基底資料表。 在SQL Server 本機執行個體中的檢視。SQL Server 會在內部將檢視參考解析成構成檢視之基底資...
CREATE TABLE AS SELECT FROM语句的语法 CREATE TABLE AS SELECT FROM语句的基本语法如下: CREATETABLEnew_table_nameASSELECTcolumn1,column2,...FROMsource_table_name; 1. 2. 3. 4. 在上面的语法中,new_table_name是你想要创建的新表的名称,column1、column2等是你想要选择的列的名称,source_table_name是...
若要创建外部数据源,请使用 CREATE EXTERNAL DATA SOURCE (Transact-SQL)。 FILE_FORMAT = external_file_format_name 指定包含外部数据文件格式的外部文件格式对象的名称。 若要创建外部文件格式,请使用 CREATE EXTERNAL FILE FORMAT (Transact-SQL)。 REJECT 选项 此CREATE EXTERNAL TABLE AS SELECT 语句运行时,...