DAT 380 Wk 4 - Practice: Knowledge Check
DAT 380 Wk 4 - Practice: Knowledge Check
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DAT 380 Wk 4 - Practice: Knowledge Check
The special operator used to check whether a subquery returns any rows is _____.
ANSI-standard SQL allows the use of special operators in conjunction with the WHERE clause.
You can select partial table contents by naming the desired fields and by placing restrictions on the rows to be included in the output.
A database language enables the user to perform complex queries designed to transform the raw data into useful information.
Which query is used to list a unique value for V_CODE, where the list will produce only a list of those values that are different from one another?
FROM PRODUCT;
FROM PRODUCT;
FROM PRODUCT;
FROM PRODUCT;
In Oracle, _____ make(s) it possible to merge SQL and traditional programming constructs, such as variables, conditional processing (IF-THEN-ELSE), basic loops (FOR and WHILE loops,) and error trapping.
- Procedural Language SQL
- embedded SQL
- dynamic SQL
- stored procedures
All changes in a table structure are made using the _____ TABLE command, followed by a keyword that produces the specific changes a user wants to make.
- ALTER
- UPDATE
- ROLLBACK
- COMMIT
The _____ constraint is used to validate data when an attribute value is entered.
- UNIQUE
- CASCADE
- SET NULL
- CHECK
_____ is a relational set operator.
The SQL data manipulation command HAVING:
- restricts the selection of grouped rows based on a condition.
- modifies an attribute's values in one or more table's rows.
- groups the selected rows based on one or more attributes.
- restricts the selection of rows based on a conditional expression.
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DAT 380 Wk 4 - Practice: Knowledge Check
The special ope