Using the SQL programming language, how would one go about changing the structure of an existing table? Which of these more significant types of shifts could be open to discussion as an option? Which commands need to be executed in order for these modifications to take effect?

(1) What are 'Assertions' and Triggers' in SQL? Why do you need them? Explain with examples.

What are the steps for changing a table's structure in SQL? Which of these important shifts should be taken into account? To put these changes into effect, what commands must be executed?

How may the SQL language be used to change a table's structure? Which of these significant changes are potential candidates for consideration? Which commands must be executed for these modifications to take place?

How do you ensure that user-defined functions in SQL maintain data consistency?

Write an SQL query to list all salespersons who work in the territory where the most end tables have been sold.

Write a SQL statement to create a table job_history including columns employee_id, start_date, end_date, job_id and department_id and make sure that, the employee_id column does not contain any duplicate value at the time of insertion and the foreign key column job_id contain only those values which are exists in the jobs table. Field EMPLOYEE_ID START_DATE END DATE JOB_ID DEPARTMENT_ID Type Decimal(6,0) Date Date Varchar(10) Decimal(4,0) Null No No No No Yes Key pk fk Default Extra Null Null Null Null Null

Prepare a MySQL script that creates your database, tables, and inserts a small sampling of madeupdata. Test it out in MySQL before submission For the below diagram write the SQL queries

How may the SQL language be used to change a table's structure? Which of these significant changes are potential candidates for consideration? Which commands must be executed for these modifications to take place?

How may the SQL language be used to change a table's structure? Which of these significant changes are potential candidates for consideration? Which commands must be executed for these modifications to take place?