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How to query sales by category in SQL?
The Sales by Category query summarizes sales data ($ figures) for all products, sorted by category, using data from three tables (Products, Orders, and Order Details) and the Order Details Extended query (equivalent to a view). Run the query – notice that there is one row per product. Then switch to SQL view:
How to aggregate discount percentages in SQL query?
Final Price = (Orig Price) (1 – d1) (1 – d2) (1 – d3) etc etc where d1, d2 are discount percentages as decimals (eg, 0.15 for 15%). So calculating the total discount for a sale becomes a sort of aggregation – but instead off summing, we are multiplying across rows.
How to get monthly sales per product in SQL?
Let’s say we have a Product table (product_id, product_name) and a Sales table (product_id, date, qty, amount). What sql query would return the monthly sales per product, and include products with no sales?
How to calculate total discount for a sale?
When calculating total discount for a sale, order is not important. To calculate the final price of an item after multiple discounts, just do something like this: Final Price = (Orig Price) (1 – d1) (1 – d2) (1 – d3) etc etc where d1, d2 are discount percentages as decimals (eg, 0.15 for 15%).
When do you need a table name in a query?
The table names are only required in the FROM, JOIN, and ON clauses, and in the latter, only because the relating column, CustomerID, has the same name in both tables. The query syntax shown above follows ANSI (American National Standards Institute) rules and should work in the latest versions of all relational databases.
What kind of query syntax does access use?
Access uses the ANSI (American National Standards Institute) style, with the JOIN and ON keywords. Access, MySQL, and Oracle all use similar syntax, with more join types and options and other set operations in MySQL and Oracle (CROSS JOIN, FULL OUTER JOIN, INTERSECT, MINUS).
How to display data with objectdatasource tutorial?
As discussed in the Displaying Data With the ObjectDataSource tutorial, a Skin file specifies the default appearance-related properties for a Web control; a Theme is a collection of Skin, CSS, image, and JavaScript files that define a particular look and feel for a website.
How to retrieve a definition item by name?
To achieve the same result as shown in Example: Retrieve definition items by name, you will need to perform a series of query operations to get the MetadataId by filtering by the entity LogicalName and then by the attribute LogicalName.
What are the basic retrieval queries in SQL?
Basic Retrieval Queries in SQL SQL has one basic statement for retrieving information from a database: the SELECT statement. The SELECT statement is not the same as the SELECT operation of relational algebra, which we discuss in Chapter 6.
What are the types of query in iorganizationservice?
Type: QueryBase. A query that determines the set of records to retrieve. Type: EntityCollection The collection of entities returned from the query. The following example shows how to use the RetrieveMultiple (QueryBase) method. For this sample to work correctly, you must be connected to the server to get an IOrganizationService interface.