对两个 SqlString 操作数执行逻辑比较,以确定第一个操作数是否小于第二个操作数。 C# 复制 public static System.Data.SqlTypes.SqlBoolean LessThan (System.Data.SqlTypes.SqlString x, System.Data.SqlTypes.SqlString y); 参数 x SqlString SqlString。 y SqlString SqlString。 返回 SqlBoolean 一个...
Dictionary<string, Type> shortMap = new(StringComparer.OrdinalIgnoreCase) { { alias,entityType } }; FormattableString formattableString = FormattableStringFactory.Create("SqlFunc.GreaterThan(T1.Name, {0})", "na"); var cs2 = sql.Where(shortMap, formattableString).ToList();收藏...
%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...
//指定位置替换SqlFunc.Stuff(stringsourceString,intstart,intlength,stringAddString) Contains c# //类似于模糊查询 like '%parameterValue%'SqlFunc.Contains(stringthisValue,stringparameterValue)//查询字符串开头 类似于模糊查询 like 'parameterValue%'SqlFunc.StartsWith(object thisValue,stringparameterValue)//...
SqlFunc.Stuff(string sourceString, int start, int length, string AddString)BOOL返回值函数字符串比大小,字符串比较,字符串对比(int)(object)it.str1>(int)(object)str2 //生成的sql //it.str1>@str2 //或者用函数 较高版本支持 SqlFunc.GreaterThan SqlFun.LessThan...
SELECTLEN('Hello World')ASStringLength; 1. 这个查询将返回字符串"Hello World"的长度,即11。 字符串是否为空判断 要判断一个字符串是否为空,我们可以使用ISNULL函数或者NULLIF函数。ISNULL函数用于判断一个字符串是否为NULL,如果字符串为NULL,则返回指定的替代值。NULLIF函数接受两个参数,如果这两个参数的值相等...
C. Use SUBSTRING with a character string The following example shows how to return only a part of a character string. From thedbo.DimEmployeetable, this query returns the family name in one column with only the first initial in the second column. ...
index_type|COMMENT'string' } [local_table_options] Local_table_option: {AUTO_INCREMENT[=]value |[DEFAULT]CHARACTERSET[=]charset_name |[DEFAULT]COLLATE[=]collation_name |COMMENT[=]'string' |ENGINE[=]engine_name |ROW_FORMAT[=]{DEFAULT|DYNAMIC|FIXED|COMPRESSED|REDUNDANT|COMPACT} ...
For example, if you're using the SQL collation SQL_Latin1_General_CP1_CI_AS, the non-Unicode string 'a-c' is less than the string 'ab' because the hyphen (-) is sorted as a separate character that comes before b. However, if you convert these strings to Unicode and you perform th...
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