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Additional info for ACTUALTESTS Oracle 1Z0-007 Exam Q and A 04 19 05
The implicit fractional seconds precision of TIMESTAMP is 6. The duration_1 column is of type INTERVAL DAY TO SECOND. The maximum number of digits in field DAY is 6 and the maximum number of digits in the fractional second is 5. ) 2-24 SQL Reference Datatypes The duration_2 column is of type INTERVAL YEAR TO MONTH. The maximum number of digits of the value in each field (YEAR and MONTH) is 2. RAW and LONG RAW Datatypes The RAW and LONG RAW datatypes store data that is not to be interpreted (not explicitly converted when moving data between different systems) by Oracle.
The values of these fields determine the value of the datatype. The table that follows lists the datetime fields and their possible values for datetimes and intervals. ) Not applicable TIMEZONE_MINUTE 00 to 59 Not applicable Note: To avoid unexpected results in your DML operations on datetime data, you can verify the database and session time zones by querying the built-in SQL functions DBTIMEZONE and SESSIONTIMEZONE. If the time zones have not been set manually, Oracle uses the operating system time zone by default.
2-6 SQL Reference Datatypes Table 2–1 Code 1 a Built-In Datatype Summary Built-In Datatype Description VARCHAR2(size) [BYTE | CHAR] Variable-length character string having maximum length size bytes or characters. Maximum size is 4000 bytes, and minimum is 1 byte or 1 character. You must specify size for VARCHAR2. BYTE indicates that the column will have byte length semantics; CHAR indicates that the column will have character semantics. 1 NVARCHAR2(size) Variable-length character string having maximum length size characters or bytes, depending on the choice of national character set.