Exam 3: The Relational : SQL

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​One common restriction placed on table and column names by DBMSs is that names cannot exceed ____________________ characters.

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18
eighteen​

The ____ function calculates the number of entries in a table.​

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A

​Based on the code above,list the descriptions of all items that are not in Storehouse 3.Based on the code above,list the descriptions of all items that are not in Storehouse 3.

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D

Based on the code above,list the descriptions of all items that are located in Storehouse 3 or for which there are more than 20 units on hand,or both.​

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____________________ means creating groups of records that share some common characteristics.​

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SQL has built-in functions,which are also called ____________________ functions.​

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SQL was developed under the name ____________________ at the IBM San Jose research facilities.​

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In versions of SQL other than Access,the ____ is used as a wildcard to represent any collection of characters.​

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​When rows are grouped,____.

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​To qualify a field name,precede the name of the field with the name of the table,followed by a(n)____________________.

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One common restriction placed on table and column names by DBMSs is that names must start with a(n)____________________.​

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​To make changes to existing data in a table,you would use the ____ command.

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How are compound conditions formed?​

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​A valid name for a table might be tbl$Student.

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Based on the code above,for each sales rep,list the rep number,the number of customers assigned to the rep,and the average balance of the rep's customers.Group the records by rep number and order the records by rep number.​

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Discuss the restriction about the structure of two tables involved in a union.​

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​The HAVING clause is to groups what the WHERE clause is to rows.

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CHAR data types are numbers without a decimal part.​

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Based on the code above,list the number,name,and balance of all customers with balances greater than or equal to $2,000 and less than or equal to $5,000.​

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For each pair of tables to be joined,a condition must be included indicating how the tables are related.​

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