Sql joins Study guides, Revision notes & Summaries

DCL is used to update the database with new records correct answers FALSE A database table is defined using the data definition language (DDL) correct answers TRUE A database is maintained and queried using the data mapping language (DML) correct answers FALSE The CREATE SCHEMA, DDL command is used to create a table correct answers FALSE SQL is a standard language for database access correct answers TRUE In databases, null values are equivalent to zero correct answers FALSE FAL...

What is data science? What do works with? demand? Joins statistics and programming in applied settings (1) Inclusive analysis - Can work with wide variety of data Take unstructured data and find order and value in it High demand for data science - both specialists and generalists Data science Venn Diagram? [Hacking]: - Gather and prepare data - Creativity needed [Math and Stats]: - Choosing procedures to answer procedure - Diagnose problems - Develop and improv...

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...

Caboodle Dictionary - correct answer Basic metadata for tables. Find Descriptions of tables and columns available in data model. Identify tables that can be linked together. Caboodle Dictionary Editor - correct answer In depth view of Caboodle ETL packages and data lineage. Shows Clarity tables data that extracted from when populating tables, which ETL packages are used by Caboodle tables and dependencies amongst the tables in Caboodle. Caboodle Executions - correct answer Where Cabo...

CDW110V CABOODLE DATA MODEL FUNDAMENTAL WITH BEST SOLUTIONS Caboodle report writer - Queries data that already exists in database. Use knowledge of the tools and source databases to conduct research into the necessary data points required for a given report. Caboodle Administrator - Uses the Caboodle console to manage and monitor the ETL process. Troubleshoot ETL errors and handle configuration steps for database. Caboodle Executions - Where Caboodle administrators can create, edit, r...

Which SQL statement is used to extract data from a database? correct answers SELECT With SQL, how do you select all the records from a table named "Persons" where the "FirstName" is "Peter" and the "LastName" is "Jackson"? correct answers SELECT * FROM Persons WHERE FirstName='Peter' AND LastName='Jackson' With SQL, how do you select all the records from a table named "Persons" where the "LastName" is alphabetically between (and including) "Hansen" and "Pettersen"? co...

What is the best way to store semi-structured data? correct answers Data should be loaded and stored in a VARIANT type column What is the best practice for handling semi-structured data with 3rd party BI tools? correct answers Create a Snowflake view that parse the semi-structured column into structure columns for the BI tool to retrieve True or False: Micro-partitions are immutable? correct answers True - subsequent changes of any type to the data will be written to additional micro-parti...

What is the best way to store semi-structured data? correct answers Data should be loaded and stored in a VARIANT type column What is the best practice for handling semi-structured data with 3rd party BI tools? correct answers Create a Snowflake view that parse the semi-structured column into structure columns for the BI tool to retrieve True or False: Micro-partitions are immutable? correct answers True - subsequent changes of any type to the data will be written to additional micro-parti...

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 ...

Forms-Based Query Language uses a GUI-panel (interactive visual components) for the creation of a query entering data values directly into a query templet lend itself well to users who are more accustomed to GUI environments than to typing commands ex: database user defines queries by entering sample data values directly into a query template to represent the result that the database is to achieve Command-Based Query Language uses written text commands for the creation of a que...