This SQL tutorial explains how to use the SQL AND condition with syntax and examples. The SQL AND condition (also known as the AND Operator) is used to test for two or more conditions in a SELECT, INSERT, UPDATE, or DELETE statement.
SQL的OR运算符用于根据多个条件筛选记录,只要有一个条件为TRUE,就会返回记录。下面是OR运算符的基本语法: 代码语言:sql AI代码解释 SELECTcolumn1,column2,...FROMtable_nameWHEREcondition1ORcondition2ORcondition3...; column1,column2,等是您要选择的列名称。 table_name是您从中选择记录的表的名称。 condition...
The first MySQL AND condition query involves a SELECT statement with 2 conditions. For example: SELECT * FROM contacts WHERE state = 'California' AND contact_id > 3000; This MySQL AND example would return all contacts that reside in the state of California and have a customer_id greater than...
private DBObject countCondi(int size) { DBObject queryCondition = new BasicDBObject("$gte", size); BasicDBObject query = new BasicDBObject("count", queryCondition); return query; }WINDOWS下安装好MongoDB后,MongoDB采用Clietn--Server 模式。WIN10下启动MongoDB服务端:-dbpath 指定 数据存储目录(...
A condition specifies a combination of one or more expressions and logical operators that evaluates to either TRUE, FALSE, or unknown. You must use this syntax whenever condition appears in SQL statements in Chapter 7, "SQL Statements". You can use a condition in the WHERE clause of these ...
Because UNKNOWN is an uncomfortable condition, most flavors of SQL change UNKNOWN to FALSE and provide a special operator, IS NULL, to test for a NULL condition. Here’s an example of NULL: Suppose an entry in the PRICE table does not contain a value for WHOLESALE. The results of a ...
BasicDBObject query=newBasicDBObject("timeStamp", queryCondition);returnquery; } 条件2的实现如下,使用 $in ArrayList<Integer> 来表示 id IN (1001,1002,1003) privateDBObject inCondi() { List<Integer> idList =newArrayList<Integer>(); idList.add(1001); ...
SQL OR Operator The SQLORoperator selects data if any one condition isTRUE. For example, -- select first and last name of customers-- who either live in the USA-- or have the last name 'Doe'SELECTfirst_name, last_nameFROMCustomersWHEREcountry ='USA'ORlast_name ='Doe'; ...
Note:If none of the rows meet theWHEREclause condition, an empty result set is returned. To learn more about all the SQL operators in detail, visitSQL Operators. Also Read: SQL Subquery (Nested Select) SQL SELECT DISTINCT Write an SQL query to retrieve the names of the products sold in ...
In addition to join conditions, the WHERE clause of a join query can also contain other conditions that refer to columns of only one table. These conditions can further restrict the rows returned by the join query. Equijoins An equijoin is a join with a join condition containing an equa...