17 - When a subquery is present in an SQL SELECT statement, the subquery is executed...
17 - When a subquery is present in an SQL SELECT statement, the subquery is executed before the main query.
True
False
18 - Retrieving a subset of the records of a file based on a field value is an example of _____.
immediate sequential retrieval
logical sequential retrieval
physical sequential retrieval
direct retrieval
indirect retrieval
19 - The SQL SELECT command is capable of executing relational Select, Project, and Join operations, singly or in combination.
True
False
20 - The SQL SELECT built-in function that adds the values of a specified set of attributes is ____.
COUNT
MIN
MAX
SUM
AVG
Homework Answers
17 - When a subquery is present in an SQL SELECT statement, the subquery is executed before the main query.
True
18 - Retrieving a subset of the records of a file based on a field value is an example of _____.
direct retrieval
19 -The SQL SELECT command is capable of executing relational Select, Project, and Join operations, singly or in combination
True
20 - The SQL SELECT built-in function that adds the values of a specified set of attributes is ____.
SUM
Add Answer to:
17 - When a subquery is present in an SQL SELECT
statement, the subquery is executed...
QUESTION 21 Complete the table below by matching each definition with the appropriate SQL clause. -A.B.C.D.E.F.G.H.I.J.K.L.M.N....
QUESTION 21 Complete the table below by matching each definition with the appropriate SQL clause. -A.B.C.D.E.F.G.H.I.J.K.L.M.N. A mandatory clause that is at the start of all SQL retrieval queries -A.B.C.D.E.F.G.H.I.J.K.L.M.N. A clause used to return only the values in a result table that are unique -A.B.C.D.E.F.G.H.I.J.K.L.M.N. A clause used to filter tuples according to some condition or predicate, like selection in relational algebra -A.B.C.D.E.F.G.H.I.J.K.L.M.N. A clause that is used to list the tables and any joins required in a query...
Create the database and tables for the database. Show all SQL statements. Include primary and foreign...
Create the database and tables
for the database. Show all SQL statements. Include primary and
foreign keys. Insert data into each table. Show select statements
and display the output of each table. Note:Student’s name must be
inserted into table as part of the data! Perform the SQL below:
Query one table and use WHERE to filter the results. The SELECT
clause should have a column list, not an asterisk (*). State the
purpose of the query; show the query and...
QUESTION 27 The SET command is used in which statement UPDATE SELECT DISTINCT DELETE FROM INSERT...
QUESTION 27 The SET command is used in which statement UPDATE SELECT DISTINCT DELETE FROM INSERT VALUES QUESTION 28 Which view would you use to see only the tables you have created ALL_TABLES USER_TABLES USER_TABS ALL_OBJECTS QUESTION 29 Which command should you use to write logical units of work to disk permanently SAVEWORK COMMIT ROLLBACK INSERT QUESTION 30 A Top-N Analysis is capable of ranking a top or bottom set of results. True False QUESTION 31 If you are performing...
Top of Form Q1 Which of the following is a valid aggregate function in SQL? Check...
Top of Form Q1 Which of the following is a valid aggregate function in SQL? Check only those that apply. Question 1 options: AVG LEAST COUNT MIN MOST SUM Q2 Which of the following aggregate functions will only operate on a numeric value expression? Check only those that apply: Question 2 options: MIN MAX AVG COUNT SUM Q3 When applying DISTINCT to the value being calculated in an aggregate function like COUNT, what is the effect? SELECT COUNT(DISTINCT StreetName) FROM...
DROP TABLE EMPLOYEE; DROP TABLE JOB; DROP TABLE EMP; DROP TABLE EMP_1; DROP TABLE EMP_2; CREATE...
DROP TABLE EMPLOYEE;
DROP TABLE JOB;
DROP TABLE EMP;
DROP TABLE EMP_1;
DROP TABLE EMP_2;
CREATE TABLE JOB(JOB_CODE CHAR (3) PRIMARY KEY, JOB_DESCRIPTION
VARCHAR (20) NOT NULL,JOB_CHG_HOUR NUMBER (5,2) NOT
NULL,JOB_LAST_UPDATE DATE NOT NULL);
INSERT INTO JOB
VALUES('500','Programmer','35.75','20-Nov-2017');
INSERT INTO JOB VALUES('501','System
Analyst','96.75','20-Nov-2017');
INSERT INTO JOB VALUES('502','Database
Designer','125.00','24-Mar-2018');
CREATE TABLE EMPLOYEE(EMP_NUM CHAR (3) PRIMARY KEY,EMP_LNAME
VARCHAR (15) NOT NULL,EMP_FNAME VARCHAR (15) NOT NULL, EMP_INITIAL
CHAR (1),EMP_HIREDATE DATE NOT NULL,JOB_CODE CHAR (3), EMP_YEARS
NUMBER (2),FOREIGN KEY (JOB_CODE) REFERENCES JOB (JOB_CODE));
INSERT...
Create the database and tables
for the database. Show all SQL statements. Include primary and
foreign keys. Insert data into each table. Show select statements
and display the output of each table. Note:Student’s name must be
inserted into table as part of the data! Perform the SQL below:
Query one table and use WHERE to filter the results. The SELECT
clause should have a column list, not an asterisk (*). State the
purpose of the query; show the query and...
DROP TABLE EMPLOYEE;
DROP TABLE JOB;
DROP TABLE EMP;
DROP TABLE EMP_1;
DROP TABLE EMP_2;
CREATE TABLE JOB(JOB_CODE CHAR (3) PRIMARY KEY, JOB_DESCRIPTION
VARCHAR (20) NOT NULL,JOB_CHG_HOUR NUMBER (5,2) NOT
NULL,JOB_LAST_UPDATE DATE NOT NULL);
INSERT INTO JOB
VALUES('500','Programmer','35.75','20-Nov-2017');
INSERT INTO JOB VALUES('501','System
Analyst','96.75','20-Nov-2017');
INSERT INTO JOB VALUES('502','Database
Designer','125.00','24-Mar-2018');
CREATE TABLE EMPLOYEE(EMP_NUM CHAR (3) PRIMARY KEY,EMP_LNAME
VARCHAR (15) NOT NULL,EMP_FNAME VARCHAR (15) NOT NULL, EMP_INITIAL
CHAR (1),EMP_HIREDATE DATE NOT NULL,JOB_CODE CHAR (3), EMP_YEARS
NUMBER (2),FOREIGN KEY (JOB_CODE) REFERENCES JOB (JOB_CODE));
INSERT...
Most questions answered within 3 hours.
-
The pH of a sample of water from a river is 5.0. A
sample of effluent from...
asked 35 minutes ago -
At the beginning of the period, the Fabricating Department
budgeted direct labor of $136,500 and equipment...
asked 1 hour ago -
Please answer all
____ 28. Rent control is usually
justified on the grounds that it protects...
asked 1 hour ago -
PARTS A-D HAVE BEEN ANSWERED. WAS TOLD TO REPOST. ONLY ANSWER
PARTS E and F.
A...
asked 1 hour ago -
2) You are given the task of finding a representation for a
circle in a drawing...
asked 2 hours ago -
STUDY QUESTION: Does use of diet drug fen-phen
(fenfluramine-phentermine) cause valvular heart disease?
HINT: Valvular heart...
asked 2 hours ago -
1. An object weighing 40 N rests on a surface. The coefficient
of friction is 0.35....
asked 3 hours ago -
Investor company owns 35% of investee company voting stock and
accounts for the investment under the...
asked 4 hours ago -
The number of major faults on a randomly chosen 1 km stretch of
highway has a...
asked 5 hours ago -
Consider the competitive environment of Starbuck's, Progressive
Insurance, a manufacturing firm with low turnover, or a...
asked 5 hours ago -
3. Gains from trade
Consider two neighbouring island countries called Euphoria and
Contente. They each have...
asked 7 hours ago -
A business executive has the option to invest money in two
plans: Plan A guarantees that...
asked 10 hours ago