In SQL Server, we have access to the CHARINDEX() function that allows us to find the position of a substring within a given string. If the result is greater than 0, it means that the substring is within the specified string. An example is as follows: SELECT * FROM products WHERE CHARIN...
SELECT [t0].[ContactName], ( SELECT COUNT(*) FROM [dbo].[Orders] AS [t1] WHERE [t0].[CustomerID] = [t1].[CustomerID] ) AS [ords], ( SELECT COUNT(*) FROM [dbo].[Employees] AS [t2] WHERE [t0].[City] = [t2].[City] ) AS [emps] FROM [dbo].[Customers] AS [t0]3.左...
3.String.Contains(substring) varq =fromcindb.Customerswherec.ContactName.Contains("Anders")selectc; 语句描述:这个例子使用Contains方法查找所有其联系人姓名中包含“Anders”的客户。 4.String.IndexOf(substring) varq =fromcindb.Customersselectnew{ c.ContactName, SpacePos= c.ContactName.IndexOf("") ...
SELECT SUBSTRING('My SQL Tutorial', 4, 3) AS PartTry it live Result: 1 record Part SQLSQL Stuff SQL Trim SyntaxSyntax for the SUBSTRING function.SUBSTRING (string, start, length)string -- a string value or a column name. start -- marks the position where the extraction will begin. ...
This method can also be used in the WHERE clause of SELECT, UPDATE, and DELETE statements. The following SELECT satement selects records from Employees table of Northwind database where Employee's Title contains a substring, 'Sales'. SELECT [EmployeeID] ,[LastName] ,[FirstName] ,[Title]...
PATINDEX函数:该函数用于查找一个字符串中某个模式的起始位置。可以使用通配符来定义模式。类似于CHARINDEX函数,可以结合SUBSTRING函数使用。 LIKE操作符:该操作符用于在WHERE子句中进行模式匹配。可以使用通配符来定义模式。例如,使用LIKE操作符可以筛选出包含指定关键字的记录。
position(substring IN string) → bigint 1. 2. 字符串截取substr 截取函数-截取start右侧字符(含start): substr(string, start) → varchar 【 substring(~)相同 】 eg: select substr('325f243f325f43', 3),substr('325f243f325f43', -3) ...
字符串截取函数:substr/substring 字符串转大写函数:upper/ucase 字符串转小写函数:lower/lcase 去空格函数:trim 左边去空格函数:ltrim 右边去空格函数:rtrim 正则表达式替换函数:regexp_replace 正则表达式解析函数:regexp_extract URL解析函数:parse_url json解析函数:get_json_object ...
SELECTname,SUBSTRING(name,1,1)ASInitial,SUBSTRING(name,3,2)ASThirdAndFourthCharactersFROMsys.databasesWHEREdatabase_id <5; Here's the result set. nameInitialThirdAndFourthCharacters mastermst tempdbtmp modelmde msdbmdb To display the second, third, and fourth characters of the string constantabcde...
union select 1,2,group_concat(column_name) from information_schema.columns where table_name='表名' and table_schema=database() //爆列 union select 1,2,group_concat(列名) from 表名 //爆值 (2)报错注入 报错注入经过构造的函数,让函数处理user...