一,SubString 截取子串 最常用的字符串函数,用于截取特定长度的子串。 SUBSTRING( expression ,start , length ) 参数说明: start 参数:整数,表示开始位置;字符的序号(index)从1开始,即第一个字符的序号是1; length参数:整数,表示截取字符的最大数量;如果start+Length 大于字符
一,SubString 截取子串 最常用的字符串函数,用于截取特定长度的子串。 SUBSTRING ( expression ,start , length ) 1. 参数说明: start 参数:整数,表示开始位置;字符的序号(index)从1开始,即第一个字符的序号是1; length参数:整数,表示截取字符的最大数量;如果start+Length 大于字符串的总长度,那么返回从Start开始...
nullif(sign(charindex(substring(theString, location, group3_offset + 1), theString, location + group3_Offset + 1)), 0) as group3_Index, nullif(sign(charindex(substring(theString, location, group2_offset + 1), theString, location + group2_Offset + 1)), 0) as group2_...
2.6.6 PATINDEX 函数 PATINDEX(pattern,string)pattern与LIKE SELECT PATINDEX('%[0-9]%','abcde53fg') --6 1. 2.6.7 REPLACE 函数 REPLACE(string, subString1, subString2) 使用subString2取代string中所有的subString1 SELECT REPLACE('abcde53fg53','53','11') --abcde11fg11 1. 2.6.8 REPLICATE ...
Help! Create index with substring Hex to String HexaDecimal to string conversion in sql server Hide SQL SELECT results in the Output window? Hiding Results Pane from Exec SP HMAC-SHA256 Ho to Compare two almost similar String Horizontal sum of columns put in last column of same table Host_na...
Below are 3 examples to map the issued object based on the ID to its source database, index or schema. 1. Key type wait resource waitresource=KEY: 6:12345678990 (987654321a9b) database_id =6 hobt_id =12345678990 hash value = (987654321a9b) ...
Dealing with Unique Columns when Using Table Partitioning First published on MSDN on Apr 02, 2013 Recently, I had the opportunity to present table and index partitioning and a follow up question came up regarding partitioning a table with unique constraint/index....
1.varchar2把所有字符都占两字节处理(一般情况下)，varchar只对汉字和全角等字符占两字节，数字，英文...
tsql字符串截取 declare@schoolnvarchar(max)set@school=N'中国人民大学(苏州校区)(K53)'select@school,len(@school)[len],charindex('(',@school)[first indexof],len(@school)+1-charindex('(',reverse(@school))[last indexof]--,reverse(@school),substring(@school,len(@school)+1-charindex('(',...
TSQL 第8章Transact-SQL语言 8.1Transact-SQL语言基础 8.1.1注释 8.1.2变量 8.1.3运算符 8.1.1注释 注释语句是起说明代码含义，增加脚本的可读性，是不执行的，有两种用法：（1）/*……*/该方法可以注释多行。（2）--（两个减号）用于一行的注释。8.1.1注释 •例1使用两种注释类型的例子。程序...