Operators
GaussDB is basically compatible with Oracle operators.
SQL Operators
No. |
Oracle |
GaussDB |
---|---|---|
1 |
Unary and binary operators |
Supported. |
2 |
Operator precedence |
Supported. |
Arithmetic Operators
No. |
Oracle |
GaussDB |
---|---|---|
1 |
Unary operators: positive (+) and negative (–). |
Supported. |
2 |
Binary operators: addition (+) and subtraction (–). |
Supported. |
3 |
Binary operators: multiplication (*) and division (/). |
Supported. |
COLLATE Operator
No. |
Oracle |
GaussDB |
---|---|---|
1 |
COLLATE collation_name |
Supported. |
Connection Operators
No. |
Oracle |
GaussDB |
---|---|---|
1 |
|| |
Supported. |
Hierarchical Query Operators
No. |
Oracle |
GaussDB |
Difference |
---|---|---|---|
1 |
prior |
Supported, with differences. |
GaussDB: Only common columns can be called. Functions cannot be called. |
2 |
connect_by_root |
Supported, with differences. |
GaussDB: When connect_by_root is called, if parentheses are used to modify the operation value, the behavior is the same as that of Oracle. If parentheses are not used, this operator can be called only for common columns. |
Set Operators
No. |
Oracle |
GaussDB |
---|---|---|
1 |
union |
Supported. |
2 |
union all |
Supported. |
3 |
intersect |
Supported. |
4 |
minus |
Supported. |
Multiset Operators
No. |
Oracle |
GaussDB |
---|---|---|
1 |
multiset except |
Supported. |
2 |
multiset intersect |
Supported. |
3 |
multiset union |
Supported. |
User-defined Operators
No. |
Oracle |
GaussDB |
Difference |
---|---|---|---|
1 |
CREATE OPERATOR |
Supported, with differences. |
|
Comparison Operators
No. |
Oracle |
GaussDB |
---|---|---|
1 |
< = |
Supported. |
2 |
< > |
Supported. |
3 |
> = |
Supported. |
4 |
^ = |
Supported. |
5 |
! = |
Not supported. For !=, if there is a space between an exclamation mark (!) and an equal sign (=), the exclamation mark will be identified as factorial. |
For comparison operators <=, <>, >=, and ^=, if there is a space between two symbols, it does not affect normal operations. For !=, if there is a space between an exclamation mark (!) and an equal sign (=), the exclamation mark will be identified as factorial, which may cause the result to be inconsistent with the expected result.
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