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Question
Given a table with the structure: EMPLOYEE (EmpNo, Name, Salary, HireDate), which of the following is not a valid ANSI SQL command?A) SELECT *
FROM EMPLOYEE
WHERE Name LIKE 'Ja%';
B) SELECT COUNT(*)
FROM EMPLOYEE
WHERE Salary < 30000;
C) SELECT HireDate, COUNT(*)
FROM EMPLOYEE
GROUP BY HireDate;
D) SELECT HireDate, COUNT(*)
FROM EMPLOYEE
WHERE Salary < 30000;
Answer
This answer is hidden. It contains 1 characters.
Related questions
Q:
Suppose you have created a data model for an airline based on a variety of forms, reports, user interviews, data sources, etc. Your client comes forward with a new desired report that includes passenger weights and a relationship between passengers and employees, neither of which is in your E-R diagram. You should ________.
A) create a new, separate E-R diagram with just the new information
B) add the relationship and the weight attribute to the existing data model
C) add the relationship but not the weight attribute
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ID-dependent entities are a common type of weak entity.
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Q:
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Q:
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A) IS
B) IS NOT
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Q:
When a table is created using existing data from multiple sources, you are likely to find that the different sources code data in slightly different ways. This is an example of ________.
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Q:
A classic example of unneeded normalization is when we are dealing with ________.
A) ZIP codes
B) sales orders and line items
C) association patterns
D) multivalued dependencies
Q:
The SQL keyword TOP ________.
A) limits the number of columns retrieved from a table
B) limits the number of rows retrieved from a table
C) limits the number of tables retrieved from a database
D) A and C
Q:
During the second step of assessing table structure, you are trying to determine ________.
A) relationships
B) candidate keys
C) updatability
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Q:
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A) counting rows
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Q:
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