Example: SQL SELECT All SQL SELECT WHERE Clause ASELECTstatement can have an optionalWHEREclause. TheWHEREclause allows us to fetch records from a database table that matches specified condition(s). For example,
SELECTDateFROM OpenDataSource( 'Microsoft.Jet.OLEDB.4.0', 'Data Source="c:\Book1.xls"; User ID=Admin;Password=;Extended properties=Excel 8.0')...Sheet1$ In this example:
A simple SQL query to this database could be: SELECT ename FROM emp; SELECT is SQL keyword which tells DBMS to select some data. Ename is a column name, as shown is table above. FROM is again SQL keyword which tells DBMS the table name from where to fetch data. ...
USE AdventureWorks2022; GO SELECT ProductID, OrderQty, SUM(LineTotal) AS Total FROM Sales.SalesOrderDetail WHERE UnitPrice < $5.00 GROUP BY ProductID, OrderQty ORDER BY ProductID, OrderQty OPTION (HASH GROUP, FAST 10); GO O. Use the UNION query hint The following example uses the MERGE...
This query creates a table that shows the subscriber’s display name, their primary extension number and the transfer string for every subscriber in the database that has their transfer rule enabled. SELECTvw_Subscriber.DisplayName, vw_CallHandler.DTMFAccessIdASExtension, vw_ContactRule.ExtensionAS'...
第一部分 SELECT basics 1.The example uses a WHERE clause to show the population of 'France'. Note that strings (pieces of text that are data) should be in 'single quotes'; Modify it to show the population of Germany SELECT population FROM world WHERE name = 'Germany'; 2.Checking a li...
We can also pass parameters to the Hibernate SQL queries, just likeJDBC PreparedStatement. The parameters can be set using the name as well as index, as shown in below example. query = session .createSQLQuery("select emp_id, emp_name, emp_salary from Employee where emp_id = ?"); ...
SELECT LastName FROM [KAWLAPTOP\SQLEXPRESS2014].[AdventureWorks2012].[Person].[Person] to do a query. Luckily we typically write queries within the context of one database so we only need to specify the Schema and TableName as so:
select distinct 姓名 from student; 删除重复数据查询结果 二:指定查询条件 1.选取‘姓名’列里值为‘猴子’的行 select 姓名,学号 from student where 姓名='猴子'; 查询条件:姓名是猴子的姓名和学号查询结果 三:单行注释及多行注释 单行注释符与注释之间要留一个空格 ...
The following example finds the sum of sales per day, and orders by the day. SQL Copy SELECT OrderDateKey, SUM(SalesAmount) AS TotalSales FROM FactInternetSales GROUP BY OrderDateKey ORDER BY OrderDateKey; I. Use the HAVING clause This query uses the HAVING clause to restrict results....