How to add primary key for two columns in same table. if possible then give simple example.

Q: How to create multiple primary keys? Create multiple primary keys for below table…

A: A primary key is a column or combination of columns in a table that uniquely identifies each row in…

Q: The option for referential integrity between the Owner table and the Pet table is cascade and an…

A: Referential Integrity - It is a concept in relational databases that ensures the consistency and…

Q: Write a query to list the first name and last name of all authors. Concatenate the first and last…

A: The SQL query is: SELECT CONCAT(CONCAT(firstname,' '),lastname) AS FullName FROM author;…

Q: II name(o dept_name ="Physics" (instructon)

A: In relational algebra expression, the SELECT operation (σ) is used to select a subset of the tuples…

Q: If multiple tables are joined together, you can select columns from specific tables by specifying…

A: In SQL, you can apply Join on multiple tables . Join is basically joining two or more tables using a…

Q: Given the table customers which contains columns customer_id, first_name, last_name, and state, and…

A: SELECT C.LASTNAME, A.STATE, A.ZIP FROM CUSTOMER AS C INNER JOIN ADDRESS AS A on…

Q: IN SQL, POSTGRESQL. For customer, product and state, show the average sales before and after each…

A: The solution for the above given question is given below:

Q: start A b a C B a b b D B b E

A:

Q: Write SQL CODE to add a new column called “Student_Nationality” in the Student table, using datatype…

A: GIVEN: Write SQL CODE to add a new column called “Student_Nationality” in the Student table, using…

Q: Using OrcalTal Show all item num and item descriptions from the item table, and a matching num…

A: Answer: Oracle table query: create table items(itemno int not null primary key,itemdesc…

Q: How would I write this function in exel? In the Time Goal field of the Log table, you will display…

A: INDEX returns a value from a range or an array depending on its location in the array, or index. The…

Q: Display the unique CType in the CLIENTS table. Sort the CType in ascending order.

A: 1. Here we need to use Keyword DISTINCT to display only unique values. The Query is SELECT DISTINCT…

Q: The option for referential integrity between the Owner table and the Pet table is cascade and an…

A: Given,The option for referential integrity between the Owner table and the Pet table is cascadeThe…

Q: Which restriction may be used to ensure that a book's category is included when it is added to…

A: Introduction: Inventory refers to the raw materials utilized in manufacturing and the finished…

Q: Write a query to get the number of different types of jobs available in the university table.…

A: Functions used in Query: The LIKE operator is used to search for a specified pattern in a column.…

Q: Write a query to create a temporary table.

A: Question. Write a query to create a temporary table. Answer. Temporary table: A temporary table…

Q: what is the necessary field in order table in access

A: Tables are the underpinning of an Access data set. Access stores information in tables. This example…

Q: This is supposed to return one Cartesian table right? What does the a and b represent here since…

A: Given SQL statement is, Select * from Employee As a, Employee As b; Here Employee is name of the…

Q: Write a Query First to Alter Table to add a new Column managername to the employee table…

A: Q:  Write a Query First to Alter Table to add a new Column managername to the employee table…

Q: One row in the PAT_ENC table represents one patient encounter. One row in the ORDER_MED table…

A: A tablе in a databasе is a collеction of rеlatеd data. It is thе basic building block of a…

Q: i. Insert all rows from Product table into Parts table by using subquery. ii. Find the average of…

A: SELECT query will fetch the result and the same will be inserted to another table using INSERT query…

Q: How many rows are returned in a Cartesian join between one table having 5 records and a second table…

A: Cartesian Join: In relational databases, the Cartesian Join between two tables refers to as the join…

Q: 19. The following code refers to the sample data in the table people. What is the result of each…

A: Note: - As per the guidelines we can only answer one specific question at a time. Please resubmit…

Q: Given the following table TABLE CUSTOMER Column Null? Туре CUS_ID NOT NULL NUMBER NAME VARCHAR2(50)…

A: In SQL, the SELECT statement can be applied to fetch records from any relation. It can display…

Q: What's the easiest way to retrieve all the rows of a table with a query?

A: 1) If we have table and we want to retrieve all rows of data, we can use we can use the wild card *…

Q: In a SELECT query, how do we link many tables together? Give an example

A: Several kinds of joins are available in SQL. These include the inner and outer joins (left outer…

Q: My SQL WORKBENCH **Please note that you may actually use as many tables as you need. You are not…

A: To display the addresses of all the departments with location information: SELECT l.LOCATION_ID,…

Q: 15. List the first name for all contacts and whether they have a spouse or not (yes/no). Order by…

A: Structured Query Language : SQL ( Structured Query Language) is an area explicit language utilized…

Q: Using apply, make a table that's a copy of raw_compensation with one additional column called Total…

A: In [ ]:compensation = raw_compensation.with_column(    "Total Pay ($)",    ...compensation

Q: Using Microsoft Access: Let a table named “Employees”, each employee has a name, mobile, salary,…

A: The Microsoft Access Query is given below with an explanation We have to use UPDATE to change the…

Q: How many rows are produced when you do a Cartesian join on two tables, one with five records and the…

A: Cartesian product means join the one table with another table.

Q: List all the names of the production companies and all the movie titles, all together in one single…

A: Since no sample table and data is provided, I have created two tables, movie and producer. Then I…

Q: How do we run a query for SQL table using a staging schema for the fact table planfactsupply

A: SQL is the simple query language which is used to Query a data easily out of many querying…

Q: As Question 3 A correlated nested query O uses tables from both the inner and the outer queries is…

A: A correlated nested query is a type of SQL subquery that uses tables from both the inner and the…

Q: The 'customer' table contains ten columns but no row. The table is then updated with 10 new rows and…

A: Start: The term "table" refers to a collection of connected data that is recorded in a database in a…

Q: How do we avoid getting duplicate entries in a query?

A:

Q: 13. Add a new column "age" of type small integer to the student table. Then use the following…

A: Answer: 13. ALTER TABLE student  ADD age smallint; UPDATE student SET age=22;   14. SELECT…