4
SQL Conditions
This chapter presents the syntax for combining one or more expressions and logical (Boolean) operators to specify a condition.
This chapter includes the following section:
■Syntax for SQL Condition Types
Syntax for SQL Condition Types
A condition specifies a combination of one or more expressions and logical (Boolean) operators and returns a value of TRUE, FALSE, or unknown.
Conditions have several forms. Table 4–1 shows the syntax for each form of condition. Refer to Chapter 5, "Subclauses" for the syntax of the subclauses found in the following table.
See Also: Conditions in Oracle Database SQL Reference for detailed information about SQL conditions
Table 4–1 Syntax for SQL Condition Types
SQL Condition Type |
Syntax |
|
|
Compound conditions |
{ (condition) |
|
| NOT condition |
|
| condition { AND | OR } condition |
|
} |
EQUALS_PATH condition |
EQUALS_PATH |
|
(column, path_string [, correlation_integer ]) |
EXISTS condition |
EXISTS (subquery) |
SQL Conditions 4-1
Syntax for SQL Condition Types
Table 4–1 (Cont.) Syntax for SQL Condition Types
SQL Condition Type |
Syntax |
|
|
|
|
Floating-point conditions |
expr IS [ NOT ] { NAN | |
INFINITE } |
Group comparison |
{ expr |
|
condition |
{ = | != | ^= | <> |
| > | < | >= | <= } |
|
{ ANY | SOME | ALL |
} |
|
({ expression_list |
| subquery }) |
| expr [, expr ]...
{ = | != | ^= | <> }
{ ANY | SOME | ALL }
({ expression_list [, expression_list ]...
|
| subquery |
|
} |
|
) |
|
} |
|
where !=, ^=, and <> test for inequality |
IN conditions |
{ expr [ NOT ] IN ({ expression_list | subquery }) |
|
| ( expr |
|
[, expr ]... |
|
[ NOT ] IN ({ expression_list |
|
[, expression_list ]... |
|
| subquery |
|
} |
|
) |
|
) |
|
} |
IS A SET conditions |
nested_table IS [ NOT ] A SET |
IS ANY condition |
[ dimension_column IS ] ANY |
IS EMPTY conditions |
nested_table IS [ NOT ] EMPTY |
IS OF TYPE conditions |
expr IS [ NOT ] OF [ TYPE ] |
|
([ ONLY ] [ schema. ] type |
|
[, [ ONLY ] [ schema. ] type ]... |
|
) |
IS PRESENT condition |
cell_reference IS PRESENT |
LIKE condition |
char1 [ NOT ] ( LIKE | LIKEC | LIKE2 | LIKE4 ) |
|
char2 [ ESCAPE esc_char ] |
Logical conditions |
{ NOT | AND | OR } |
MEMBER condition |
expr [ NOT ] MEMBER [ OF ] nested_table |
NULL conditions |
expr IS [ NOT ] NULL |
4-2 Oracle Database SQL Quick Reference
Syntax for SQL Condition Types
Table 4–1 (Cont.) Syntax for SQL Condition Types
SQL Condition Type |
Syntax |
|
|
|
|
Range conditions |
expr [ NOT |
] BETWEEN expr AND expr |
REGEXP_LIKE condition |
REGEXP_LIKE(source_string, pattern |
|
|
|
[, match_parameter ] |
|
|
) |
Simple comparison |
{ expr |
|
condition |
{ = | != |
| ^= | <> | > | < | >= | <= } |
|
expr |
|
|
| (expr [, |
expr ]...) |
|
{ = | != |
| ^= | <> } |
|
(subquery) |
|
|
} |
|
|
where !=, ^=, and <> test for inequality |
|
SUBMULTISET conditions |
nested_table1 |
|
|
[ NOT ] SUBMULTISET [ OF ] |
|
|
nested_table2 |
|
UNDER_PATH condition |
UNDER_PATH |
(column [, levels ], path_string |
|
|
[, correlation_integer ] |
|
|
) |
|
|
|
SQL Conditions 4-3
Syntax for SQL Condition Types
4-4 Oracle Database SQL Quick Reference