A. Use SUBSTRING with a character string The following example shows how to return only a part of a character string. From thesys.databasestable, this query returns the system database names in the first column, the first letter of the database in the second column, and the third and fou...
抽取子字符串错误(SUBSTRING_ERROR) 22027 截断错误(TRIM_ERROR) 22024 未结束的C字符串(UNTERMINATED_C_STRING) 2200F 零长度的字符串(ZERO_LENGTH_CHARACTER_STRING) 22P01 浮点异常(FLOATING_POINT_EXCEPTION) 22P02 非法文本表现形式(INVALID_TEXT_REPRESENTATION) 22P03 非法二进制表现形式(INVALID_BINARY_REPRESENT...
substring: The string or character value to search in another string. string: The string value where you want to search substring parameter. start_location: Optional. The integer value indicating the starting position where the search should begin. The index starts from 1. If nothing is specified...
The SUBSTRING function allows one character string to be extracted from another. SQL99 Syntax SUBSTRING(extraction_string FROM starting_position [FOR length] [COLLATE collation_name]) If any of the inputs are NULL, the SUBSTRING function returns a NULL. The extraction_string is where the characte...
string.DECLARE@positionINT, @stringCHAR(8);-- Initialize the current position and the string variables.SET@position=1;SET@string='New Moon'; WHILE @position <= DATALENGTH(@string)BEGINSELECTASCII(SUBSTRING(@string, @position,1)),CHAR(ASCII(SUBSTRING(@string, @position,1)))SET@position= @...
SELECT Rtrim(Ltrim(Substring(name, Charindex('店', name) + 1, Len(name))) AS name INTO #t1 FROM #temp 1. 2. 3. 下面是这几个函数的使用说明: Substring Returns the part of a character expression that starts at the specified position and has the specified length. The position parameter...
start– specifies the starting point of the first character you want to return. SQL Server starts counting at 1. So SUBSTRING('MSSQLTips',3,3) returns 'SQL', SUBSTRING('MSSQLTips',6,3) returns 'Tip'. If you have a length below 1, SQL Server will count back although it will not ...
The following query returns 4 characters starting from 3 position from the string 'abcdefgh' SELECT SUBSTRING('abcdefgh',3,4); --- cdef The following query returns the initial character of firstname from employees table SELECT SUBSTRING(firstname,1,...
返回character_expression 右起 integer_expression 个字符。 3、SUBSTRING() SUBSTRING (<expression>, <starting_ position>, length) 返回从字符串左边第starting_ position 个字符起length个字符的部分。 四、字符串比较函数 1、CHARINDEX() 返回字符串中某个指定的子串出现的开始位置。
SUBSTRING (<expression>, <starting_ position>, length) SUBSTRING() 函数返回的子串是从字符串左边第starting_ position 个字符起length个字符的部分。其中表达式可以是字符串或二进制串或含字段名的表达式。SUBSTRING()函数不能用于TEXT 和IMAGE 数据类型。