
Concept explainers
“COUNT()” function:
In SQL, the “COUNT()” function will return the total number of rows in the table with satisfying the criteria mentioned in the “WHERE” clause.
Table creation:
Query to create “INVOICE” table:
CREATE TABLE INVOICE (INV_NUMBER INTEGER PRIMARY KEY, CUS_CODE INTEGER, INV_DATE DATE);
Query to insert values into “INVOICE” table:
INSERT INTO INVOICE VALUES (1001, 10014, '16-Jan-18');
INSERT INTO INVOICE VALUES (1002, 10011, '16-Jan-18');
INSERT INTO INVOICE VALUES (1003, 10012, '16-Jan-18');
INSERT INTO INVOICE VALUES (1004, 10011, '17-Jan-18');
INSERT INTO INVOICE VALUES (1005, 10018, '17-Jan-18');
INSERT INTO INVOICE VALUES (1006, 10014, '17-Jan-18');
INSERT INTO INVOICE VALUES (1007, 10015, '17-Jan-18');
INSERT INTO INVOICE VALUES (1008, 10011, '17-Jan-18');

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Chapter 7 Solutions
EBK DATABASE SYSTEMS: DESIGN, IMPLEMENT
- Could you help me to know features of the following concepts: - commercial CA - memory integrity - WMI filterarrow_forwardBriefly describe the issues involved in using ATM technology in Local Area Networksarrow_forwardFor this question you will perform two levels of quicksort on an array containing these numbers: 59 41 61 73 43 57 50 13 96 88 42 77 27 95 32 89 In the first blank, enter the array contents after the top level partition. In the second blank, enter the array contents after one more partition of the left-hand subarray resulting from the first partition. In the third blank, enter the array contents after one more partition of the right-hand subarray resulting from the first partition. Print the numbers with a single space between them. Use the algorithm we covered in class, in which the first element of the subarray is the partition value. Question 1 options: Blank # 1 Blank # 2 Blank # 3arrow_forward
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- using r languagearrow_forwardusing r language Obtain a bootstrap t confidence interval estimate for the correlation statistic in Example 8.2 (law data in bootstrap).arrow_forwardusing r language Compute a jackknife estimate of the bias and the standard error of the correlation statistic in Example 8.2.arrow_forward
- Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781305627482Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781285196145Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos CoronelPublisher:Cengage Learning


