query

Python

Python MongoDB Query

Filter the Result When finding documents in a collection, you can filter the result by using a query object. The first argument of the find() method is a query object, and is used to limit the search. Example Find document(s)…

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2025-04-04

SQL COUNT Function

Example Return the number of products in the “Products” table: SELECT COUNT(ProductID) AS NumberOfProducts FROM Products; Definition and Usage The COUNT() function returns the number of records returned by a select query. Note: NULL values are not counted. Syntax COUNT(expression)

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2025-03-17

MySQL COUNT Function

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2025-03-09

SQL CREATE OR REPLACE VIEW Keyword

CREATE OR REPLACE VIEW The CREATE OR REPLACE VIEW command updates a view. The following SQL adds the “City” column to the “Brazil Customers” view: Example CREATE OR REPLACE VIEW [Brazil Customers] AS SELECT CustomerName, ContactName, City FROM Customers WHERE…

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2025-03-08

SQL ALL Keyword

ALL The ALL command returns true if all of the subquery values meet the condition. The following SQL statement returns TRUE and lists the productnames if ALL the records in the OrderDetails table has quantity = 10:

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2025-03-08