Inner join Study guides, Class notes & Summaries

Primary Key A field (or group of fields) that uniquely identifies a row in a table. Primary keys cannot be NULL and cannot be modified or deleted. Unique Key A field (or group of fields) that uniquely identifies a row in a table. Unique keys can be NULL and can be modified or deleted. Foreign Key A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables SELECT Retrieves data from one or more...

WGU D191 - Advanced Data Management (SQL) || Questions & Answers (Rated A+) WGU D191 - Advanced Data Management (SQL) || Questions & Answers (Rated A+) to combine Rows from tables based on a match condition - ANSWER - primary purpose of a JOIN is: returns a single value (scalar) or Row set that is immediately available for use in the Outer query - ANSWER - A subquery: Returns a distinct list of Rows from both tables. like a Logical OR would do... - ANSWER - UNION operator Returns AL...

Paycom Interview Questions All Answers Correct What is a dynamic ip address and a static ip address? - Difference between static and dynamic IPs. When a device is assigned a static IP address, the address does not change. Most devices use dynamic IP addresses, which are assigned by the network when they connect and change over time - A dynamic IP address is an IP address that's automatically assigned to each connection, or node, of a network, like your smartphone, desktop PC, wireless ...

What is table ? correct answers The table is a collection of record and its information at a single view. What are different types of statements supported by SQL? correct answers 1. DDL - Used to create tables, views etc 2. DML - These statements are used to manipulate the data in records 3. DCL (Data Control Language)- These statements are used to set privileges such as Grant and Revoke database access permission to the specific user. Different clauses in SQL correct answers Usage...

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...

CPT 231 Final Exam Review Questions With 100% Correct Answers a.) The class that defines the object b.) The interface that the object implements c.) Any subclass of the class that defines the object **d.) All of the above - answerA variable that stores an object that implements an interface can be declared as which of the following data types? "Order" is displayed in a message box. - answerWhat happens when the code that follows is executed? Order order = new Order(); order.Print(); ...

CPT 231 Final Exam Review Questions With 100% Correct Answers a.) The class that defines the object b.) The interface that the object implements c.) Any subclass of the class that defines the object **d.) All of the above - answerA variable that stores an object that implements an interface can be declared as which of the following data types? "Order" is displayed in a message box. - answerWhat happens when the code that follows is executed? Order order = new Order(); order.Print(); ...

What does modality refer to? How does it appear on ER diagram? - ANSWERRefers to the MINIMUM number of times an instance in one entity can be associated with instance of another entity (minima) Appears as a 0 or 1 on the relationship line, next to cardinality Define: Referential Integrity - ANSWER- Requires that ALL foreign key values must either be fully NULL or match some primary key value 4 Ways Referential Integrity can be violated: - ANSWER- 1. Primary key is updated 2. Foreign key i...

(Summary) SAP Certified Development Associate, With Complete Verified Solution 100% Which ABAP Dictionary object can reference a domain? Please choose the correct answer. Choose one: Database table field Data element Table type Structure Data element In which controller type can you embed a service call? Please choose the correct answer. Choose one: Interface controller View controller Component controller Configuration controller Component controller What can be part of t...

A Data Analyst has joined your team, however, he is not familiar with Databricks SQL. Which of the following steps will allow him to locate Data Explorer? A) Go to SQL Warehouse, and click on the "Data Explore" button B) Go to SQL Editor, next to Schema Explore, and click on Data Explore to access Data Explorer C)Click "Data" in the sidebar menu to access the Data Explorer D) On Databricks SQL, landing page, under SQL, click on "Data Explore" next to "SQL Query Editor" to access Da...