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Questions and Answers
What is the primary purpose of the SQL WHERE clause?
What is the correct way to enclose a text value in a SQL query?
Which of the following operators can be used in the SQL WHERE clause?
What should be done when working with numeric fields in a SQL query?
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What is the purpose of the syntax section in a SQL tutorial?
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Study Notes
SQL WHERE Clause
- The WHERE clause is used to filter records, extracting only those that fulfill a specified condition.
- It is used to specify the condition for which records to include in the result set.
Syntax
- The syntax for the WHERE clause depends on the database system being used.
Demo Database
- The Customers table is used in the examples, with a selection of fields shown.
Text Fields vs. Numeric Fields
- SQL requires single quotes around text values, although most database systems also allow double quotes.
- Numeric fields should not be enclosed in quotes, unlike text values.
Operators in The WHERE Clause
- The = operator is not the only operator that can be used in the WHERE clause.
- Other operators can be used to filter the search, including: (Note: The other operators are not specified in the provided text, but will be included in a comprehensive study of the WHERE clause.)
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Description
Learn about the SQL WHERE clause, its syntax, and how it's used to filter records based on specific conditions.
