SQL Syntax
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Questions and Answers

Which organization is responsible for defining and maintaining the syntax of the SQL programming language?

  • IEEE
  • ACM
  • W3C
  • ISO/IEC SC 32 (correct)

    • What is a delimited identifier in SQL?

  • An identifier that cannot be equal to a reserved keyword
  • An identifier that is not supported in SQL
  • An identifier enclosed in double quotation marks (correct)
  • An identifier that is always a reserved keyword

    • What is the purpose of predicates in SQL?

  • To produce scalar values or tables consisting of columns and rows of data
  • To limit the effects of SQL statements and queries (correct)
  • To retrieve data based on specific criteria
  • To control program flow

    • What is the significance of the semicolon (;) in SQL statements?

    <p>It is a standard part of the SQL grammar</p> Signup and view all the answers

    What is the purpose of queries in SQL?

    <p>To retrieve data based on specific criteria</p> Signup and view all the answers

    What is the difference between reserved and non-reserved keywords in SQL?

    <p>Reserved keywords cannot be used as identifiers unless they are delimited, while non-reserved keywords can be used freely</p> Signup and view all the answers

    What is the purpose of clauses in SQL statements?

    <p>To serve as constituent components of statements and queries</p> Signup and view all the answers

    What is the purpose of predicates in SQL?

    <p>To limit the effects of statements and queries, or to change program flow</p> Signup and view all the answers

    What is the difference between insignificant whitespace and significant whitespace in SQL?

    <p>Insignificant whitespace is ignored in SQL statements and queries, while significant whitespace is mandatory</p> Signup and view all the answers

    What is the purpose of the semicolon (;) in SQL statements?

    <p>To indicate the end of a SQL statement</p> Signup and view all the answers

    What is a delimited identifier in SQL?

    <p>An identifier that is enclosed in double quotation marks</p> Signup and view all the answers

    What is the purpose of SQL clauses?

    <p>To constitute components of statements and queries</p> Signup and view all the answers

    What is the difference between reserved and non-reserved keywords in SQL?

    <p>Reserved keywords are not allowed to be used as identifiers, while non-reserved keywords can be used as identifiers</p> Signup and view all the answers

    What is the purpose of SQL expressions?

    <p>To produce scalar values or tables of data</p> Signup and view all the answers

    What are SQL predicates used for?

    <p>To specify conditions that limit the effects of statements and queries</p> Signup and view all the answers

    What is the purpose of SQL queries?

    <p>To retrieve data based on specific criteria</p> Signup and view all the answers

    What is the purpose of SQL statements?

    <p>To have a persistent effect on schemata and data or to control program flow</p> Signup and view all the answers

    What is the significance of the semicolon (;) in SQL statements?

    <p>It is used as a statement terminator</p> Signup and view all the answers

    What is the purpose of SQL statements?

    <p>To control transactions, program flow, connections, sessions, or diagnostics</p> Signup and view all the answers

    What is the difference between a reserved and non-reserved keyword in SQL?

    <p>Reserved keywords are defined in the SQL language, while non-reserved keywords are not</p> Signup and view all the answers

    What are delimited identifiers in SQL?

    <p>Identifiers enclosed in double quotation marks that can contain characters not supported in SQL identifiers</p> Signup and view all the answers

    What is the role of expressions in SQL?

    <p>To produce scalar values or tables consisting of columns and rows of data</p> Signup and view all the answers

    What is the purpose of predicates in SQL?

    <p>To specify conditions that can be evaluated to SQL three-valued logic</p> Signup and view all the answers

    What is the significance of the semicolon (;) in SQL statements?

    <p>It is used to indicate the end of a statement</p> Signup and view all the answers

    What is the role of queries in SQL?

    <p>To retrieve data based on specific criteria</p> Signup and view all the answers

    What is the purpose of the SQL UPDATE clause?

    <p>To modify records in a table</p> Signup and view all the answers

    What are SQL predicates used for?

    <p>To retrieve data based on specific criteria</p> Signup and view all the answers

    What is the purpose of SQL expressions?

    <p>To produce scalar values or tables consisting of columns and rows of data</p> Signup and view all the answers

    What is the purpose of SQL queries?

    <p>To retrieve data based on specific criteria</p> Signup and view all the answers

    What is the difference between a reserved and non-reserved keyword in SQL?

    <p>Reserved keywords are used for database objects, while non-reserved keywords are used for data manipulation</p> Signup and view all the answers

    What is the purpose of SQL clauses?

    <p>To specify constituent components of statements and queries</p> Signup and view all the answers

    What is the significance of the double quotation marks in SQL identifiers?

    <p>They are used to delimit identifiers that contain characters not supported in SQL identifiers</p> Signup and view all the answers

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