In which of the following cases would it make the most sense to use a b-tree index? SELECT * FROM customer WHERE email LIKE '%gmail%'; SELECT * FROM employee WHERE title LIKE '%IT%'; SELECT * FROM invoice WHERE invoice_id > 10 AND invoice_id < 200; SELECT * FROM customer
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In which of the following cases would it make the most sense to use a b-tree index?
-
SELECT *
FROM customer
WHERE email LIKE '%gmail%'; -
SELECT *
FROM employee
WHERE title LIKE '%IT%'; -
SELECT *
FROM invoice
WHERE invoice_id > 10 AND invoice_id < 200; -
SELECT *
FROM customer
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- Access Assignment Problem: JMS TechWizards is a local company that provides technical services to several small businesses in the area. The company currently keeps its technicians and clients’ records on papers. The manager requests you to create a database to store the technician and clients’ information. The following table contains the clients’ information. Client Number Client Name Street City State Postal Code Telephone Number Billed Paid Technician Number AM53 Ashton-Mills 216 Rivard Anderson TX 78077 512-555-4070 $315.50 $255.00 22 AR76 The Artshop 722 Fisher Liberty Corner TX 78080 254-555-0200 $535.00 $565.00 23 BE29 Bert's Supply 5752 Maumee Liberty Corner TX 78080 254-555-2024 $229.50 $0.00 23 DE76 D & E Grocery 464 Linnell Anderson TX 78077 512-555-6050 $485.70…Problem: JMS TechWizards is a local company that provides technical services to several small businesses in the area. The company currently keeps its technicians and clients’ records on papers. The manager requests you to create a database to store the technician and clients’ information. The following table contains the clients’ information. Client Number Client Name Street City State Postal Code Telephone Number Billed Paid Technician Number AM53 Ashton-Mills 216 Rivard Anderson TX 78077 512-555-4070 $315.50 $255.00 22 AR76 The Artshop 722 Fisher Liberty Corner TX 78080 254-555-0200 $535.00 $565.00 23 BE29 Bert's Supply 5752 Maumee Liberty Corner TX 78080 254-555-2024 $229.50 $0.00 23 DE76 D & E Grocery 464 Linnell Anderson TX 78077 512-555-6050 $485.70 $400.00 29 GR56 Grant Cleaners 737 Allard Kingston TX 78084 512-555-1231 $215.00 $225.00 22…In Oracle database, If we have Iname field and fname in our table then we can combine concatenate these two fields to create a full name This combination can be used in SELECT clause to generate result: I: 'Mr./Mrs '|| Iname||', '||fname as full_Name II: concat('Mr./Mrs ', Iname, fname) as full_Name I & II: are correct I & II: are not correct || I & II: are not correct I & II: are correct
- Create a PL/SQL database programming block with DECLARE BEGIN END; In Declare section define a local scalar (simple) variables. lv_deptno NUMBER And assign initial values as 10 lv_deptno NUMBER := 50; In Declare section again, define a cursor and select last_name, salary and manager_id of employees the ones who are working in the department defined in a) In this example department will be lv_deptno:=50; Sample code: Cursor c_emp as SELECT last_name, salary, manager_id FROM employees WHERE department_id = lv_deptno; In the execution section (BEGIN and END) Create CURSOR FOR LOOP for cursor to process In this cursor loop, your code has to check salary and also manager_id numbers each time new records being fetched. And based on these conditions either employee gets raise or not get raise. If employee salary is less than 5000 and also if employees managers is either 101 or 124 then it means employee is due for raise otherwise employee is not due for raise Sample…Create 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,…An insurance company needs to store their salespeople’s information who are selling their insurance policies. They already have a database with multiple tables, one of the tables (Salesperson) stores information about each salesperson along with the bonus percent they receive, based on the city where the insurance is sold. The table has the following fields: Salesperson(spID, spName, spBirthDate,spCitySelling, bonusPercent) spID: Unique identification number of the salesperson. spName: Full name of the salesperson. spBirthDate: Birthdate of the salesperson. spCitySelling: The city in which the salesperson is selling the insurance. bonusPercent: The bonus percent received by the salesperson based on the city in which he/she sells the insurance. Each salesperson can sell the insurance in just one city. However, for a city, there can be more than one salesperson appointed. Also, the bonus percent is fixed for each city. For example, all of the salespeople who sells insurance in…
- A key for this database is {Departure Time}. Enter a different key for the database. Airline Flight Number Gate Destination Departure Time FlyRight 221 34 Denver 08:27 JetGreen 222 13 Anchorage 08:43 JetGreen 199 22 Honolulu 08:46 JetGreen 322 34 Anchorage 09:36 FlyRight 122 33 Honolulu 09:45 FlyRight 323 22 Detroit 09:50 FlyRight 222 33 Denver 09:55 Key: { Ex: GateCustomers CustomerID INT ◆ FirstName VARCHAR(50) ◆ LastName VARCHAR(50) H > Email VARCHAR(100) > Address TEXT Indexes F | Orders OrderID INT > CustomerID INT > OrderDate DATE ◆ TotalAmount DECIMAL (10,2) Indexes # ShippingInformation ShippingID INT > OrderID INT → ShippingAddress TEXT ShippingDate DATE -K > EstimatedArrivalDate DATE → ShipmentStatus VARCHAR(50) Indexes Reviews ReviewID INT > ProductID INT > CustomerID INT ◆ Rating INT Comment TEXT > DatePosted DATE Indexes OrderDetails OrderDetailID INT ▶I > OrderID INT HI-KO ProductID INT → Quantity INT Subtotal DECIMAL (10,2) Indexes T Categories CategoryID INT ◆ CategoryName VARCHAR(255) Indexes Products ProductID INT -H ProductName VARCHAR(255) > Description TEXT ◆ Price DECIMAL (10,2) -I+ CategoryID INT > DiscountID INT Indexes Discounts DiscountID INT ◆ Discount Code VARCHAR(50) ◆ Discount Percentage DECIMAL (5,2) > StartDate DATE > EndDate DATE Indexes For the design above, Write in SQL a query to print customer names who made…In OES4 database, we can verify the values stored in subtotal field by using the following 1: col gross_sales for 99999999 col subtotal for 99999999 select o.order_no,sum(qty*Unit_cost) Gross_Sales, sum(o.subtotal) subtotal from orders o, orderline ol, product p where o.order_no=ol.order_no and ol.product_no=p.product_no group by o.order_no; II: col gross_sales for 99999999 col subtotal for 99999999 select o.order_no,sum(qty*Unit_cost) Gross_Sales, sum(o.subtotal) subtotal from orders o, orderline ol, product p where o.order_no=ol.order_no and ol.product_no=p.product_no group by o.order_no; I & II: are correct I & II: are not correct | || I & II: are not correct I & II: are correct
- In java create an application to manage your data base information the database is already created in mysql tables, the tables are fill, So the user can use your database application user friendly Retrieve all data: Given a table name, retrieve all data from the table and present it to the user. Average: Given a table name and a column name, return the average of the column. Here the assumption is that the column type will be numeric (e.g., cost column). Insert: Given a table name, your program should show the column names of that table and ask the users to input new data to the table. In case of errors, your program should directly show the MySQL errors to the users. Assumption 1: Users will enter data according to the database constraints. Assumption 2: Users will input one record at a time. Delete: Given a table name, your program should show the column names of that table and ask the users to input data that they want to delete. Assumption 1: Users will enter data according to the…ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'show database CREATE DATABASE [Da]USE PETSTORE' at line 3mysql> use petstoreERROR 1049 (42000): Unknown database 'petstore'mysql> create database [da] -> use petstore -> -> CREATE TABLE USERS (user_id VARCHAR(30), password -> VARCHAR(30), first_name VARCHAR(50), last_name VARCHAR(50));ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '[da] ========== whats the wrong with this work , what code is correct when i ma trying to make a new table and a new databse in this mysql commend line ?What are the three phases of the Pandas groupby function? O Share - show- send O Spit - join - enumerate Merge - join - append O Spit - apply combine