Subquery - Study guides, Class notes & Summaries

Which of the following queries will use a subquery to find the rows in the invoice table in the country USA that have the invoice total larger than the average of invoices of those in the country Canada?
a.)
SELECT * FROM invoice
WHERE total >
(SELECT AVG(total) FROM invoice
WHERE billing_country = 'Canada') AND billing_country = 'USA';
b.)
SELECT * FROM invoice
WHERE total >
(SELECT AVG(total) FROM invoice
WHERE billing_country = 'USA') AND billing_...

The syntax of the DECODE function starts with _____. correct answers DECODE(e, x, y, d) String manipulation functions are rarely used in programming correct answers False If a designer wishes to create an inner join, but the two tables do not have a commonly named attribute, he can use a(n) _____ clause. correct answers JOIN ON An implicit cursor is automatically created in procedural SQL when the SQL statement returns only one value correct answers True In Oracle, the _____ function...

WGU C170 Data Management Problem Solving Exam Questions and With Distinction level Marking scheme updated 2024/2025 inner join - correct answer A join operation in which only rows that meet a given criterion are selected. The most common type of join outer join - correct answer A join operation that produces a table in which all unmatched pairs are retained; unmatched values in the related table are left null c - correct answer A join operation that returns the Cartesian product of two ...

A subquery can return a result set, a column of one or more rows, or a single ______________________. - Answer- cell In many cases, a subquery can be restated as a/an _____________ - Answer- join A correlated subquery is a subquery that is executed once for each ______________________ in the outer query. - Answer- row, row processed When you code a subquery in a FROM clause, it returns a result set that can be referred to as an _____________________________ view. - Answer- inline If ...

S307 Final Exam Study Guide with Complete Solutions join - Correct Answer - relational operation that causes two or more tables with a common domain to be combined into a single table or view - can use "JOIN" or "INNER JOIN"..."ON" - common columns appear redundantly in the result table - can use "=", ">","<" ,"<>" equi-join - Correct Answer - join in which the joining condition is based on equality between values in the common columns natural join - Correct A...

SELECT - Answer- You can use the AS keyword with the CREATE TABLE statement to create a copy of a table from a ____________________ statement. SELECT DELETE WHERE LIKE DELETE - Answer- By default, MySQL automatically commits changes to the database immediately after each INSERT, UPDATE, and ______________ statement that you issue. ON DELETE AS COMMIT null - Answer- When you code a column list in an INSERT statement, you can omit columns with default values and col...

ORDER BY must be placed at the end of the SQL statements When using ORDER BY reference, the column name in force is whatever column name exists in the first SELECT statement An INDEX object is built on one or more columns in a table The INDEX stores data from its table's columns on which it is built and presorts that data in order to speed future queries When the DML statements INSERT, UPDATE, and DELETE are executed on an indexed table the indexed data is chang...

(Answered) CIST 1220 Final Review: CIST 1220 SQL - Gwinnett Technical College. WHERE You can join tables by using a condition in the ____ clause. period (.) To qualify a column name, precede the name of the column with the name of the table, followed by a(n) ____. IN To retrieve data from multiple tables in a query you can use the ____ operator with a subquery. EXISTS You can precede a subquery with the ____ operator to create a condition that is true if one or more rows are obtained...

Associative Entity - An associative entity is an element of the entity-relationship model. All relationships for the associative entity should be many. Attribute - An attribute is a property or characteristic of an entity. Binary relationship - A binary relationship is a relationship between two entity types. Candidate Key - Is any column or a combination of columns that can qualify as unique key in database. Cardinality - Cardinality represents the maximum number of entities that can be i...

Question 1 (2 marks) Which of the following is an aggregate expression that will find the oldest date in the invoiceDate column? 1. MIN(invoiceDate) 2. MAX(invoiceDate) 3. HIGH(invoiceDate) 4. LOW(invoiceDate) Question 2 (2 marks) Which of the following LIMIT clauses will return a maximum of five rows starting with the eleventh row in the result set? 15 ICT3612/102/0/2024 1. LIMIT 10, <= 5 2. LIMIT 11, <= 5 3. LIMIT 10, 5 4. LIMIT 11, 5 Question 3 (2 marks) When coded in a...