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- Let's wa(k through a review of basic SQL syntax, using as an example the database that was mentionedearlier. This database has the following simple structure(* indicates a primary key):Courses: CourseID*, CourseName, TeacherIDTeachers: TeacherID*, TeacherNameStudents; StudentID*, StudentNameStudentCourses: CourseID*, StudentID*Using the above table, implement the following queries.Query 1: Student Enrollment Query 2: Teacher Class Size): Can "ORDER BY" statement be used before "GROUP BY" statement in SQL? Justify your opinion with an example. ): Explain "Selection", "Projection", and "Natural Join" with relevant examples.Write a detailed reflection on “Comparison of NoSQL and SQL Databases in the Cloud”. You can include some more resources for building up your reflection. The web link to a research paper “Comparison of NoSQL and SQL Databases in the Cloud” is given in the college Moodle web page (hyperlink of the research article is given below): https://vulms.vu.edu.pk/Courses/BIT703/Downloads/HammesEtal.pdf
- : Write SQL queries DDL Queries to implement the following Relational Model i.e. create the Nurse and Care_Center relations (including primary key and foreign key). Intelligently write data types. Show Output.1. Create a PL/SQL function. The minimal requirements: using the cursor in PLSQL function, retrieve data from object table and record the data in the PL/SQL table, make calculations with object data and define return value of the function, test the operation of the function (get the result). The maximal requirements: you can add IF-ELSEIF's, cursor processing in loops, more interesting semantic functions. 2. Create methods for object types. The minimal requirements: use map/order methods (1 method) (method+ demonstration), use MEMBER methods (2 methods) (methods + demonstration). The maximal requirements: non-trivial methods, that use more complex comparisons or do more complex calculations – i.e., give a couple more constructs in code. 3. Demonstrate the multiset operators. The minimal requirements: using 2 different multiset operators (can be included in the code), they can also be used in the The maximal requirements: the queries make sense semantically, one of the queries is a…SQL: Create a SQL query that uses an uncorrelated subquery and no joins to display the descriptions for products provided by a vendor in area code 615. Remember, the main difference between a correlated subquery and uncorrelated subquery is that, in a correlated subquery, the inner query is dependent upon the outer query, while, with an uncorrelated query, the inner query does not depend upon the outer query. Instead, it runs just once. You should NOT use union, minus, or intersect in this query. The outer query will use the PRODUCT table and the inner query will use the VENDOR table [hint: you should have 9 records of output]. My code: select p_descript from product where (select v_areacode from vendor where v_areacode = '615' ; I am getting this error, problem is I can't see what is missing any assistance is appreciated. ORA-00936: missing expression
- Q2: Design Database for the following scenario and Write SQL queries. Create an ERD for the following scenario. Suppose there is a grocery store near your house. Following can be considered for ERD: A grocery store may have more than one employee. A grocery store has exactly one manager. The manager has one or more sales men working under him. Grocery store has more than one portion for the products. • Each product has a barcode, name, expired date. Many customers can busy many products, but each product is bought by only one customer. Each customer will get an invoice for his /her purchase. The bill invoice has an id.Write an SQL query that uses a multiple-column subquery in a FROM clause. Explain what the query is intended to do. Write an SQL query that is based on multiple tables and uses a subquery with the GROUP BY statement and HAVING clause. Explain what the query is intended to do. Write an SQL query that is based on multiple tables and uses a multiple-row subquery in a WHERE clause. The subquery will include the GROUP BY statement and another multiple-row subquery in a HAVING clause. Explain what the query is intended to do. Write an SQL query that joins three tables and uses any type of a subquery. Explain what the query is intended to do. Write an SQL query that is based on multiple tables and uses the DECODE function. Explain what the query is intended to do.Question 2 Structured Query Language (SQL) is a standard computer language for relational database management and data manipulation. SQL queries are used to insert, update and modify data. By referring to the Table1 below, write the SQL statements for the following: Table 1: Students ID Names PhoneNumber Country Somalia Age 1234 Aishah 0131234561 18 Absya Ah Meng Bee Chean Malaysia China 4567 0131234562 21 8910 01312345673 20 1112 01312345674 Korea 19 1314 Buchanan 0131234565 Korea 20 (a) Add new column: Ambition Varchar (20). (b) Display Names and Ambition for 20 year old students using SQL. (c) Delete Table Students. (d) Delete column country. (e) Use SQL statements to update all Country names in the Students table from Korea to Malaysia.
- A better design would be one with the following tables: Patient : | pid | name | dob | addr | tel | Exam : | acc | pid | eid | result | date | ExamDictionary : | eid | name | normal | Questions: Create SQL queries (select statements) that accomplish the following. 1. List all of the Exams for Ms. Jones (pid=12). 2. List all of the Patients that hail from jolly old London. 3. List all of the Exams with results that exceed their normal. 4. List the name of all Patients that had Exams with results that exceed their (the exam’s) normal. 5. List the name of all Patients that had Exams with results that exceed their (the exam’s) normal, but list names only once and in alphabetical order.You are working with a database table that contains customer data. The table includes columns about customer location such as city, state, country, and postal_code. The state names are abbreviated. You want to check for state names that are greater than 2 characters long. You write the SQL query below. Add a LENGTH function that will return any state names that are greater than 2 characters long.SQL QUERIES Employees(EMPLOYEE_ID, FIRST_NAME, LAST_NAME, EMAIL, PHONE_NUMBER, HIRE_DATE,JOB_ID, SALARY, COMMISSION_PCT, MANAGER_ID, DEPARTMENT_ID,DEPARTMENT_NAME)Department(DEPARTMENT_ID, DEPARTMENT_NAME, MANAGER_ID, LOCATION_ID)Location(LOCATION_ID,STREET_ADDRESS,POSTAL_CODE,CITY,STATE_PROVINCE,COUNTRY_ID) Write a Query in SQL to delete the record of all those cities where city name ends with b fromlocations table.