Operator LIKE is used to include only values that match a pattern with wildcards. Wildcard character is * or %, it can be at the beginning of a pattern '*value', at the end 'value*', or at both '*value*'. Wildcard in the middle of a patern 'va*lue' is not allowed. [C#] ...
WHERE A operator B 练习:查询超过 20 岁的教师。select * from teachers where age > 20; 2.逻辑运算符:AND、OR、NOT ① 使用AND连接多条件: 使用SQL 中的逻辑运算符 AND 可以将 WHERE 子句中将两个或两个以上的条件结合起来,其结果是满足 AND 连接的所有条件的数据。 语法: SELECT `column_name` FROM...
WHERE A operator B 练习:查询超过 20 岁的教师。select * from teachers where age > 20; 2.逻辑运算符:AND、OR、NOT ① 使用AND连接多条件: 使用SQL 中的逻辑运算符 AND 可以将 WHERE 子句中将两个或两个以上的条件结合起来,其结果是满足 AND 连接的所有条件的数据。 语法: SELECT `column_name` FROM...
This statement can also be used like bellow: SQL Code: SELECT * -- Selecting all columns (*) from the table FROM agents -- From the table named "agents" WHERE working_area = 'London' OR working_area = 'Mumbai' OR working_area = 'Chennai'; ...
SQL LIKE OperatorThe LIKE operator is used to list all rows in a table whose column values match a specified pattern. It is useful when you want to search rows to match a specific pattern, or when you do not know the entire value. For this purpose we use a wildcard character '%'. ...
TheINoperator allows you to specify multiple values in aWHEREclause. TheINoperator is a shorthand for multipleORconditions. ExampleGet your own SQL Server Return all customers from 'Germany', 'France', or 'UK' SELECT*FROMCustomers WHERECountryIN('Germany','France','UK'); ...
operator 为操作符,常用的有等于=<><>!=。 简单的insert语句 使用INSERT INTO 在不指定列的情况下插入数据 INSERT INTO 语句用于向表中插入新记录,这边介绍两种编写形式,第一种形式无需指定列名,第二种形式需要指定列名。 INSERT INTO `table_name`
Here, the SQL command selects rows if thecountryis either theUSAor theUK. Example: SQL IN Operator Example: IN Operator to Select Rows Based on Country Value TheINoperator can be used to choose rows where a specific value is present in the specified field. ...
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XORExclusive OR (XOR). Exclusive OR (XOR). 5.字符串模糊查询:LIKE --查询A开头的first name SELECT * FROM student WHERE first_name LIKE ‘a%’ --查询为A结尾的first name SELECT * FROM student WHERE first_name LIKE ‘%a’ --查询first name里面有a的学生 SELECT * FROM student WHERE first_...