INSERTINTOtable_nameVALUES(value1,value2,value3,...); (2).指明插入的列和对应值 1 INSERTINTOtable_name (column1,column2,column3...)VALUES(value1,value2,value3...); (3).INSERT INTO和SELECT * INTO的区别 1 2 insertintoscorebakselect*fromsocrewhereneza='neza'--插入一行,要求表scorebak ...
Select distinct column1, column2, … from table_name; Select count(distinct country) from customer; And & OR NOT Order by用于按升序或者降序对结果集进行排列,默认是升序,desc降序 Insert into两种表示 从查询表中插入 NULL值,字段没有值 Is null : select column_names from table_name where column_n...
-- Select rows from table 'Customers' SELECT * FROM dbo.Customers; 查詢結果會顯示在輸入文字的區域底下。 您也可以選取下列其中一個選項來修改結果呈現的方式: 第一個按鈕會顯示 文字檢視的結果,如下一節中的影像所示。 中間按鈕會在方格檢視 顯示結果,這是預設選項。 第三個按鈕可讓您將結果儲存至擴展名...
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是你想要从中选择数据的源表的名称。 CREATE...
SELECT row_group_id, CAST(deleted_rows AS float)/CAST(total_rows AS float)*100 AS [% fragmented], created_time FROM sys.dm_db_column_store_row_group_physical_stats WHERE object_id = OBJECT_ID('FactOnlineSales2') AND state_desc = 'COMPRESSED'...
SELECT name FROM sys.databases WHERE name = N'TutorialDB' ) CREATE DATABASE [TutorialDB] GO USE [TutorialDB] -- Create a new table called 'Customers' in schema 'dbo' -- Drop the table if it already exists IF OBJECT_ID('dbo.Customers', 'U') IS NOT NULL ...
Applies to: SQL Server 2008 (10.0.x) SP 1 and later versions. Specifies the assembly and method to which the created function name shall refer. assembly_name - must match a value in the name column of SELECT * FROM sys.assemblies;. The name that was used on the CREATE ASSEMBLY statemen...
table_name | table_name } ( column [ , ...n ] ) [ ORDER (column [ , ...n ] ) ] [ WHERE <filter_expression> [ AND <filter_expression> ] ] [ WITH ( <with_option> [ , ...n ] ) ] [ ON <on_option> ] [ ; ] <with_option> ::= DROP_EXISTING = { ON | OFF } -...
SQL生成:根据解析结果生成对应的SQL语句,如“SELECT department_name FROM departments WHERE average_salary > (SELECT AVG(salary) FROM employees)”。 执行与反馈:系统执行SQL查询并返回结果,同时可能对结果进行进一步的解释或分析。 Text2SQL的应用领域广泛,包括智能客服、数据分析、金融、医疗、教育等,能够显著提高...
InObject Explorer, locate the table from which you want to delete columns, and expand the table to expose the column names. Right-click the column that you want to delete, and chooseDelete. In theDelete Objectdialog box, selectOK.