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數值常值語法

下列語法用於 ODBC 中的數值常值:

numeric-literal ::= signed-numeric-literal | unsigned-numeric-literal

signed-numeric-literal ::= [ sign ] unsigned-numeric-literal

unsigned-numeric-literal ::= exact-numeric-literal | approximate-numeric-literal

exact-numeric-literal ::= unsigned-integer [ period[ unsigned-integer ]] |period unsigned-integer

sign ::= plus-sign | 減號

approximate-numeric-literal ::= mantissa E 指數

mantissa ::= exact-numeric-literal

exponent ::= 帶正負號整數

signed-integer ::= [ sign ] unsigned-integer

unsigned-integer ::= digit...

plus-sign ::= +

減號 ::= -

digit ::= 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0

period ::= 。