string[] cities = new string[] { "Seattle", "London", "Vancouver", "Paris" }; var q = db.Customers.Where(p=>cities.Contains(p.City)).ToList();语句描述:这个例子使用Contains查找其所在城市为西雅图、伦敦、巴黎或温哥华的客户。LINQ to SQL语句(8)之
接下来,我们需要编写T-SQL查询语句来实现StartsWith。假设我们需要检查表"Customers"中的"Name"列是否以特定字符串开头。 # 编写T-SQL查询语句query="SELECT * FROM Customers WHERE Name LIKE 'search_string%'" 1. 2. 在上面的代码中,我们使用了LIKE运算符结合通配符“%”来定义StartsWith。"search_string"是...
(String.format(errmsg+" '%s'",matcher.group()));}}}privatestaticbooleanisEnable(int checkflag){return(whereCheckFlag&checkflag)==checkflag;}/** * 对 where SQL 语句安全性(防注入攻击)检查 * @param where * @return always where * @throws IllegalArgumentException where 语句有安全问题 */...
%STARTSWITH string - 匹配必须以指定的字符串开始。 FOR SOME - 布尔比较条件。对于指定字段的至少一个数据值,For Some条件必须为True。 FOR SOME %ELEMENT - 带有%VALUE或%KEY谓词子句的列表元素比较条件。%value必须与列表中至少一个元素的值匹配。%key必须小于或等于列表中的元素数。%VALUE和%KEY子句可以使用...
4.String.IndexOf(substring) varq =fromcindb.Customersselectnew{ c.ContactName, SpacePos= c.ContactName.IndexOf("") }; 语句描述:这个例子使用IndexOf方法查找每个客户联系人姓名中出现第一个空格的位置。 5.String.StartsWith(prefix) varq =fromcindb.Customerswherec.ContactName.StartsWith("Maria")se...
For an issue where this trace flag is useful see Non-yielding scheduler dumps during the recovery of a secondary availability database with a database snapshot KB5007794.Scope: Global only. 4022 Disables automatic execution of stored procedures when SQL Server starts. For more information about ...
-N takes a string value that can be one of true, false, or disable to specify the encryption choice. (default is the same as omitting the parameter) If -N and -C aren't provided, sqlcmd negotiates authentication with the server without validating the server certificate. If -N is provid...
e.EmployeeName FROM RegionalSales rs JOIN Employees e ON rs.Region = e.Region WHERE ...
9.WHERE：用于过滤检索条件。10.ORDER BY：用于对结果集进行排序。11.GROUP BY：用于将结果集按照一列...
Gets or sets the string used to open a SQL Server database. C#复制 [System.ComponentModel.SettingsBindable(true)]publicoverridestringConnectionString {get;set; } Property Value String The connection string that includes the source database name, and other parameters needed to establish the initial ...