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Oracle SQL

Oracle SQL for OCA 1z-052

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This flashcard set delves into Oracle SQL, covering essential concepts like operators, datatypes, and record management. It focuses on querying techniques, including the use of the BETWEEN operator for filtering data within specified ranges, and explores the structure of tables like EMP, with columns such as ENAME, SALARY, and DEPTNO. The flashcards are particularly useful for database administrators and developers looking to enhance their SQL querying skills and understand the intricacies of data manipulation in Oracle databases.

Cartes-fiches

Utilisateurs

Langue

Anglais

Catégorie

Informatique

Niveau

Autres

Créé / Mis à jour

20.02.2017 / 20.02.2017

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EMPNO ENAME SALARY COMM DEPTNO
----------- ----------- ----------- ---------- -------------
7369 SMITH 800 20
7499 ALLEN 1600 300 30
7521 WARD 1250 500 30
7566 JONES 2975 20
7654 MARTIN 1250 1400 30
7698 BLAKE 2850 30
7782 CLARK 2450 24500 10
7788 SCOTT 3000 20
7839 KING 5000 50000 10
7844 TURNER 1500 0 30
7876 ADAMS 1100 20
7900 JAMES 950 30
7902 FORD 3000 20
7934 MILLER 1300 13000 10

Refer to the listing of records in the EMP table in question 9. How many rows will the following
query return?

SELECT * FROM emp WHERE ename BETWEEN 'A' AND 'C'

A) 4

B) 2

C) A character column cannot be used in the BETWEEN operator

D) 3

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= avant/arrière,

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D) Here, a character column is compared against a string using the BETWEEN operator, which is equivalent to
ename >= 'A' AND ename <= 'C'