SELECT * FROM Websites WHERE name IN ('Google','菜鸟教程'); 1. 2. IN 与 = 的异同 相同点:均在WHERE中使用作为筛选条件之一、均是等于的含义 不同点:IN可以规定多个值,等于规定一个值 IN SELECT column_name(s) FROM table_name WHERE column_name IN (value1,value2,...); = SELECT column_...
In SQL Server, the SELECT statement can have an optional WHERE clause to filter the data. The WHERE clause can include one or more boolean conditions to filter out data of the tables. The WHERE clause always comes after the FROM clause and before GROUP BY, HAVING, and ORDER BY clauses....
This SQL tutorial explains how to use the SQL WHERE clause with syntax and examples. The SQL WHERE clause is used to filter the results and apply conditions in a SELECT, INSERT, UPDATE, or DELETE statement.
SQL - WHERE Clause - The SQL WHERE clause is used to filter the results obtained by the DML statements such as SELECT, UPDATE and DELETE etc. We can retrieve the data from a single table or multiple tables(after join operation) using the WHERE clause.
Using theORlogical operator is another method of working with several conditions in the MySQLWHEREclause. If we submit this query, it will return data matching the criteria we set. The company wants to check the regular customers coming from two cities. For that, we’ll specify those cities ...
The Microsoft Access database engine selects the records that meet the conditions listed in the WHERE clause. If you do not specify a WHERE clause, your query returns all rows from the table. If you specify more than one table in your query and you have not included a WHERE clause or ...
Important:If a field is used with an aggregate function, you cannot specify criteria for that field in a WHERE clause. Instead, you use a HAVING clause to specify criteria for aggregated fields. For more information, see the articlesAccess SQL: basic concepts, vocabulary, and syntaxandHAVING ...
The Microsoft Access database engine selects the records that meet the conditions listed in the WHERE clause. If you do not specify a WHERE clause, your query returns all rows from the table. If you specify more than one table in your query and you have not included a WHERE clause or ...
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Example 2:WHEREClause With Multiple Conditions Say we have a table calledemployeeswith columnsid,name,department, andsalary. We want to select all employees who work in either theSalesorMarketingdepartments and have a salary greater than or equal to 50000. We can use the logical operatorANDto ...