diff options
Diffstat (limited to 'doc/src/sgml/sql.sgml')
| -rw-r--r-- | doc/src/sgml/sql.sgml | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/src/sgml/sql.sgml b/doc/src/sgml/sql.sgml index 47d7febad50..8026e4a7c09 100644 --- a/doc/src/sgml/sql.sgml +++ b/doc/src/sgml/sql.sgml @@ -288,7 +288,7 @@ attributes are taken from. We often write a relation scheme as <parameter>D<subscript>i</subscript></parameter>, for each attribute <parameter>A<subscript>i</subscript></parameter>, - 1 <&equal; <literal>i</literal> <&equal; <literal>k</literal>, + 1 <= <literal>i</literal> <= <literal>k</literal>, where the values of the attributes are taken from. We often write a relation scheme as <literal>R(<parameter>A<subscript>1</subscript></parameter>, @@ -325,11 +325,11 @@ attributes are taken from. We often write a relation scheme as integers. We define this by assigning a data type to each attribute. The type of <classname>SNAME</classname> will be <type>VARCHAR(20)</type> (this is the <acronym>SQL</acronym> type - for character strings of length <&equal; 20), + for character strings of length <= 20), the type of <classname>SNO</classname> will be <type>INTEGER</type>. With the assignment of a data type we also have selected a domain for an attribute. The domain of <classname>SNAME</classname> is the set of all - character strings of length <&equal; 20, + character strings of length <= 20, the domain of <classname>SNO</classname> is the set of all integer numbers. </para> |