var query = sql.Substring(0, sql.Length - keyword.Length); Console.WriteLine(query); } } 4. 使用 Split 切割 前面几种方式都是在 string 上做文章,要么 substring,要么 LastIndexOf,要么 EndsWith,其实也可以跳出这个定势思维,转换成数组进行处理,用union all作为分隔符切割字符串,如果数组的最后一个元素...
//1.创建compiled query NorthwindDataContext db = new NorthwindDataContext(); var fn = CompiledQuery.Compile( (NorthwindDataContext db2, string city) => from c in db2.Customers where c.City == city select c); //2.查询城市为London的消费者,用LonCusts集合表示,这时可以用数据控件绑定 var LonCu...
xpath_string 函式 xxhash64 函式 year 函式 zeroifnull 函式 zip_with 函式 zstd_compress 函式 zstd_decompress 函式 使用者定義彙總函式 (UDAF) 與Hive UDF、UDAF 和 UDTF 整合 使用者定義純量函式 (UDF) Lambda 函式 視窗函數 資料類型 識別碼 名稱 名稱解析 IDENTIFIER 子句 Null 語意 信息架構 INF...
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However, if a query references a temporary table and two temporary tables with the same name exist at that time, it isn't defined which table the query is resolved against. Nested stored procedures can also create temporary tables with the same name as a temporary table that was created by...
428G8 The view cannot be enabled for query optimization. 428GB A character could not be converted and substitution characters are not allowed. 428GC An invalid string unit was specified for a function. 428GH The data type of one or more parameters specified in the ADD VERSION clause does no...
StartsWith - Yes, see notes. - - - Supported for (StartsWith(\<column>, "string value")), but not for (StartsWith("string value", \<column>)). EndsWith - Yes, see notes. - - - Supported for (EndsWith(\<column>, "string value")) but not for (EndsWith("string value", \<...
LIKESimple pattern matching. Use%to match zero, one, or multiple characters. Check that a string begins with a value:<value>%, ends with a value:%<value>, or contains a value:%<value>%. RLIKEPattern matching with regular expressions. ...
STARTSWITH(<string_expr_1>, <string_expr_2> [, <bool_expr>]) 参数 说明 string_expr_1一个字符串表达式。 string_expr_2要与string_expr_1的开头进行比较的字符串表达式。 bool_expr(可选)用于忽略大小写的可选值。 设置为true时,STARTSWITH进行区分大小写的搜索。 如果未指定,则此默认值为false。
For example, a money column that contains the value 1,234,567.123456 is bulk exported to a data file as the character string 1234567.1235. Command options for character format You can import character format data into a table using bcp, BULK INSERT (Transact-SQL), or OPENROWSET (Transact-SQL...