Q
::= |
SELECT |
C
{[, C] | *}
|
query/select
clause |
|
|
|
FROM |
S
[, S]
|
|
from
clause |
|
|
[WHERE |
P] |
|
where
clause |
|
|
||||
C
::= |
[T.]
A |
column |
||
|
|
||||
S
::= |
T
[AS T] |
source |
||
|
|
||||
P ::= |
P AND P |
predicate /conjunction |
||
| |
C O C |
|
join |
|
| |
C O V |
|
selection |
|
| |
[NOT] EXISTS (Q) |
|
existential |
|
| |
C [NOT] IN (Q) |
|
membership |
|
| |
C O {ALL|ANY (Q)}
|
|
quantified |
|
|
|
||||
O
::= |
< | <=
| = | >= | >
| <> |
operator |
||
|
|
||||
T
::= |
|
table
identifier |
||
|
|
||||
A
::= |
|
attribute identifier |
||
|
|
||||
V
::= |
|
string
or numerical value |
||