1. Write a SELECT statement that returns four columns based on the Invoice To column of the Invoices table: • Use the CAST function to return the first column as data type decimal with 2 digits to the right of the decimal point. • Use CAST to return the second column as a varchar. • Use the CONVERT function to return the third column as the same data type as the first column. • Use CONVERT to return the fourth column as a varchar, using style 1. 2. Write a SELECT statement that returns three columns based on the InvoiceDate column of the Invoices table: Use the CAST function to return the first column as data type varchar.
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.
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