Task 7: Create a view named INVOICE_TOTAL. It consists of the invoice number and invoice total for each invoice currently on file. (The invoice total is the sum of the number of units ordered multiplied by the quoted price on each invoice line for each invoice.) Sort the rows by invoice number. Use TOTAL_AMOUNT as the name for the invoice total. Task 8: Using the INVOICE_TOTAL VIEW write and execute the command to retrieve the invoice number and invoice total for only those orders totaling more than $250. 1 Task 9: Repeat Task 8 without using the INVOICE_TOTAL VIEW.
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
Task 7: Create a view named INVOICE_TOTAL. It consists of the invoice number and invoice total for each invoice currently on file. (The invoice total is the sum of the number of units ordered multiplied by the quoted price on each invoice line for each invoice.) Sort the rows by invoice number. Use TOTAL_AMOUNT as the name for the invoice total.
Task 8: Using the INVOICE_TOTAL VIEW write and execute the command to retrieve the invoice number and invoice total for only those orders totaling more than $250.
Task 9: Repeat Task 8 without using the INVOICE_TOTAL VIEW.
Task 10: List all the tables contained within the system catalog.
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Task 11: List all the columns contained within the system catalog.
Task 12: List all the views contained within the system catalog.
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