"A series of statements enclosed by BEGIN and END. Blocks define which set of statements will be affected by control-of-flow language such as IF or WHILE. You can nest BEGIN...END blocks within other BEGIN... END blocks." (Microsoft Corporation, "SQL Server 7.0 System Administration Training Kit", 1999)
"A section of code grouped together by braces that sets apart a section of code in a smaller area than a full procedure. A procedure might contain several blocks of code." (Greg Perry, "Sams Teach Yourself Beginning Programming in 24 Hours 2nd Ed.", 2001)
"A sequence of PL/SQL code, beginning with DECLARE or BEGIN and ending with END. The block is a core organizational unit of PL/SQL programming. See Chapter 2 for a thorough discussion." (Bill Pribyl & Steven Feuerstein, "Learning Oracle PL/SQL", 2001)
"A series of Transact-SQL statements enclosed by BEGIN and END. You can nest BEGIN...END blocks within other BEGIN...END blocks." (Anthony Sequeira & Brian Alderman, "The SQL Server 2000 Book", 2003)
"A syntactic construct consisting of a sequence of Perl statements that is delimited by braces. The if and while statements are defined in terms of BLOCKs, for instance. Sometimes we also say 'block' to mean a lexical scope; that is, a sequence of statements that acts like a BLOCK, such as within an eval or a file, even though the statements aren’t delimited by braces." (Jon Orwant et al, "Programming Perl" 4th Ed., 2012)
"A Transact-SQL statement enclosed by BEGIN and END." (Microsoft, "SQL Server 2012 Glossary", 2012)
"The information stored in a sector" (Nell Dale & John Lewis, "Computer Science Illuminated" 6th Ed., 2015)
"A set of rows retrieved from a database server that are transmitted as a single result set to satisfy a cursor FETCH request." (Sybase, "Open Server Server-Library/C Reference Manual", 2019)
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