Oracle Core, Лекция 3-2

1. Таблица DUAL 2. Конструкция WITH. Рекурсивные запросы с конструкцией WITH 3. Иерархические запросы (self joins): START WITH, CONNECT BY, PRIOR, NOCYCLE, ORDER SIBLINGS BY, LEVEL, CONNECT_BY_ISCYCLE, CONNECT_BY_ISLEAF, SYS_CONNECT_BY_PATH, CONNECT_BY_ROOT 4. Псевдостолбцы (pseudocomlumns). 4.1 ORA_ROWSCN (SCN_TO_TIMESTAMP, TIMESTAMP_TO_SCN) 4.2 ROWID (DBMS_ROWID) 4.3 ROWNUM 5. Конструкция SAMPLE 6. Конструкция PIVOT 7. Конструкция UNPIVOT 8. Оператор INSERT INTO SINGLE TABLE 9. Оператор INSERT INTO MULTITABLE: INSERT ALL, INSERT FIRST 10. Оператор UPDATE 11. Оператор DELETE 12. Оператор MERGE 13. Обновляемая VIEW (KEY-PRESERVED TABLE) 14. SQL FUNCTIONS: SYSDATE, EXTRACT, ADD_MONTH, MONTH_BETWEEN, UPPER/LOWER, LENGTH, SUBSTR, INSTR, REPLACE, LTRIM/RTRIM/TRIM, LPAD/RPAD, TO_CHAR, TO_NUMBER, TO_DATE, POWER, ABS, ROUND, CEIL/FLOOR, USER, TRUNC, GREATEST/LEAST