8) Which datatype can store unstructured data in a column? CHAR RAW NUMERIC VARCHAR
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8) Which datatype can store unstructured data in a column?
- CHAR
- RAW
- NUMERIC
- VARCHAR
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- Alternate keys: Identify at least five keys (not already listed as PK or FK) needed by end users. These indexes would be considered Alternate or Secondary keys and are mostly used for queries and quick reporting. They may contain multiple columns. Books Authors Bookstore Members Sales transaction table Inventory tableAlternate keys: Identify at least five keys (not already listed as PK or FK) needed by end users. These indexes would be considered Alternate or Secondary keys and are mostly used for queries and quick reporting. They may contain multiple columns.MySql Workbench CREATE TABLE students ( id INT PRIMARY KEY, first_name VARCHAR(50), last_name VARCHAR(50), age INT, major VARCHAR(50), faculty VARCHAR(50)); CREATE TABLE location ( id INT PRIMARY KEY, name VARCHAR(50), rooms INT); CREATE TABLE faculty ( id INT PRIMARY KEY, name VARCHAR(50), department_id INT); 1. List last name of all students whose first name is longer than 4 letters in ascending order accordingto the last name. Duplicated rows should be removed from the output.2. Count the total number of rooms in Location.3. Find the number of students in each major.4. Find the number of employees in each department who get no commission or have salary less than5000.5. Find the maximum salary of employees in each department that the employee was hired 15 yearsbefore now. *hint: user TIMESTAMPDIFF(<unit type>,<Date_value 1>,<Date_value 2>), the unitcan be YEAR, MONTH, DAY, HOUR, etc...
- Composite datatypes may only include multi row and multi column values.Answers: Yes NoCreate the following indices, giving them an appropriate name in your spreadsheet (make sure to use the reverse-coded variable where relevant): Belief that climate change is a real phenomenon: Take the mean of scepticism_2, scepticism_6, and scepticism_7. Preferences for government intervention to solve problems in society: Take the mean of cog_1, cog_2, cog_3, cog_4, cog_5, and cog_6. Feeling of personal responsibility to act pro-environmentally: Take the mean of PN_1, PN_2, PN_3, PN_4, PN_6, and PN_7. When creating indices, we may be interested to see if each item used in the index measures the same underlying variable of interest (known as reliability or consistency). There are two common ways to assess reliability: either look at the correlation between items in the index, or use a summary measure called Cronbach’s alphaCronbach’s alpha A measure used to assess the extent to which a set of items is a reliable or consistent measure of a concept. This measure ranges from 0–1,…Composite datatypes can only have multi row &multi column values in them Answers: Yes No
- Using the WideWorldDistributors database and the Sales schema create a function that takes InvoiceID as an input parameter and returns all the rows from the table InvoiceLines for the InvoiceID value passed into the function. If the result is a NULL return a zeroThe MongoDB shell is an interactive ______interface to MongoDB. You can use the mongo shell to query and update data as well as perform administrative operations. A. NodeJS B. JavaScript C. C D. SQLViews may be used as data security components, but they also have their constraints.
- Alter table product so that column productType is an integer instead of a varchar, not null should be maintained. Alter table product so that column productType is a foreign key to table productType, column id Alter table customer so that column zipCode is a foreign key to table çityState. column zipCode Alter table customer to drop column city and state Alter table employee so that column zipCode is a foreign key to table çityState. column zipCode Alter table employee to drop column city and state Alter table supplier so that column zipCode is a foreign key to table çityState, column zipCode Alter table supplier to drop column city and stateHow can data dictionaries assist in the optimization of query performance?Data Manipulation Discussion What is the syntax of composite conditions - that is, selection or merging on two or more columns?