Happy Shop sells different products to the customers. A customer could buy one or more products at a time. An invoice will be issued to a customer for cach purchase. Table 1 is used to record all the data in the shop. Customer Customer Invoice Name Product Product Price $50 $67 Date Quantity ID No ID Helen Helen Helen Mary Davis Davis 001 N123 21/3/2022 3. P12 P13 21/3/2022 25/3/2022 28/3/2022 28/3/2022 28/3/2022 001 001 N123 N124 N125 N126 N126 Table 1: Happy Shop Database P12 $50 002 P14 $87 2. 003 P12 $50 3 003 PIS $26 (a) Identify the primary key with minimum number of attributes of Table 1 and discuss THREE different update anomalies in Table 1 with examples. (b) State the nomal form that Table 1 belongs to. Then, normalize Table I to 3NF by showing the table schema for each table.

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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.