Concept explainers
WHERE Statement:
“WHERE” statement is used limit the number of rows. For example:Consider a table “FTable” that has two columns named “FruitName” and “Color”. “WHERE” clause is used when there is a need to display the entire FruitName whose color is Red.
SELECT * FROM FTable WHERE color = 'red';
When the above statement is executed, red colored fruits get displayed.
ORDER BY Clause:
SQL contains “ORDER BY” clause in order to sort rows. The values get sorted in ascending as well as descending order. The keyword used to sort values in ascending order is “ASC” and for descending order is “DESC”. By default, it sorts values by ascending order.
Syntax:
SELECT column_Name1, column_Name2 FROM table_Name ORDER BY column_Name2;
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Chapter 5 Solutions
A Guide to SQL
- Why it's useful to have index that partially sort a query if it doesn't present all of the results already sorted?arrow_forwardPHP Using PHP write a function that does the query to select all transactions order by date desc.arrow_forwardIn EXCEPT (MINUS) queries, the order of operands matters, but in UNION queries, it doesn't?arrow_forward
- This dataset “Birthweight_reduced_kg_R" contains information on new born babies and their parents. In the following a description of each variable is given: Name Variable Baby number Length of baby (cm) Weight of baby (kg) headcirumference Head Circumference ID length Birthweight Gestation Gestation (weeks) smoker Mother smokes 1 = smoker 0 = non-smoker motherage Maternal age Number of cigarettes smoked per day by mother mnocig Mothers height (cm) Mothers pre-pregnancy weight (kg) Father's age mheight mppwt fage Father's years in education Number of cigarettes smoked per day by father fedyrs fnocig Father's height (kg) Low birth weight, 0 = No and 1 = yes Mother over 35, 0 = No and 1 = yes fheight lowbwt mage35 Task 1: Load the csv file into Python environment and get the required columns to be used as x and y. Task 2: Use correlation coefficient to find and discuss the following: 1. Relationship between maternal height and baby length. 2. Relationship between mother's pre-pregnancy…arrow_forward4arrow_forwardSQL: Create a SQL query that uses an uncorrelated subquery and no joins to display the descriptions for products provided by a vendor in area code 615. Remember, the main difference between a correlated subquery and uncorrelated subquery is that, in a correlated subquery, the inner query is dependent upon the outer query, while, with an uncorrelated query, the inner query does not depend upon the outer query. Instead, it runs just once. You should NOT use union, minus, or intersect in this query. The outer query will use the PRODUCT table and the inner query will use the VENDOR table [hint: you should have 9 records of output]. My code: select p_descript from product where (select v_areacode from vendor where v_areacode = '615' ; I am getting this error, problem is I can't see what is missing any assistance is appreciated. ORA-00936: missing expressionarrow_forward
- Using a SET operator, Display all names that are used both as a last name and a first name. Example: Taylor Grant, Winston Taylor We want to display the name Taylor because it is used in both column.arrow_forward7) How can you change "Hansen" into "Hilsen" in the "LastName" column in the "Persons" table? a) UPDATE Persons SET LastName='Hasen' INTO LastName='Hilsen'b) MODIFY Persons SET LastName='Hansen' INTO LastName='Hilsen'c) MODIFY Persons SET LastName='Nilsen' WHERE LastName='Hansen'd) UPDATE Persons SET LastName='Nilsen' WHERE LastName='Hansen'arrow_forward44arrow_forward
- List the first name and last name of all authors. Concatenate the first and last names so that the result set has only one column. Hint: CONCAT(). For example: +---------------+ | Full Name | +---------------+ | Mike Lance | | Steve Smith | | Anne Penny | | Ron MacDonald | | Sylvia Parry | | Albert Jones | +---------------+arrow_forwardExplain set operator in SQLarrow_forwardFind your group number• The remainder after division of second to last digit of your student id by 3 is a.• The last digit of your student id is b.• Your group number is ab, which is an integer between 0 and 29.• If your group number is equal to ab=00 then take it as ab=01.Examples:• Student Id = 290316027 → Group = 27• Student Id = 290315043 → Group = 13• Student Id = 280315061 → Group = 01• Student Id = 270316085 → Group = 25• Student Id = 290315027 → Group = 27 my student Id is 280316014 but i didnt calculate ab.Can you help me .Thank you.arrow_forward
- COMPREHENSIVE MICROSOFT OFFICE 365 EXCEComputer ScienceISBN:9780357392676Author:FREUND, StevenPublisher:CENGAGE LA Guide to SQLComputer ScienceISBN:9781111527273Author:Philip J. PrattPublisher:Course Technology PtrNp Ms Office 365/Excel 2016 I NtermedComputer ScienceISBN:9781337508841Author:CareyPublisher:Cengage