What are the INSERT TRIGGER, DELETE TRIGGER and UPDATE TRIGGER. Explain with examples.
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What are the INSERT TRIGGER, DELETE TRIGGER and UPDATE TRIGGER. Explain with examples.
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- The Developers team also wants you to ensure that emails are converted to lowercase after an update operation. Currently, new insertions are guaranteed to have lowercase emails, but there is no such guarantee for legacy emails. Therefore, the team wants to ensure that emails are being retained in a lowercase irrespective of any changes in the database. Create a new TRIGGER called email_update for the USERS table that runs before an UPDATE operation. Task Create a TRIGGER to run on the USERS table before any UPDATE operation.Task 5: The Developers team also wants you to ensure that emails are converted to lowercase after an update operation. Currently, new insertions are guaranteed to have lowercase emails, but there is no such guarantee for legacy emails. Therefore, the team wants to ensure that emails are being retained in a lowercase irrespective of any changes in the database. Create a new TRIGGER called email_update for the USERS table that runs before an UPDATE operation.de Show Review View Tell me whatyou want to do. Sign in & Share less you need to edit, it's safer to stay in Protected View. Enable Editing Calculate mean value Mean Amean value Ex = sum of all data values (x,, X, X3,) n= number of data values
- Task 5: The Developers team also wants you to ensure that emails are converted to lowercase after an update operation. Currently, new insertions are guaranteed to have lowercase emails, but there is no such guarantee for legacy emails. Therefore, the team wants to ensure that emails are being retained in a lowercase irrespective of any changes in the database. Create a new TRIGGER called email_update for the USERS table that runs before an UPDATE operation. Task: Create a TRIGGER to run on the USERS table before any UPDATE operation. (SQL Database Test): Create a TRIGGER before any UPDATE operations on the USERS table1. The rows in the JOBS table store a minimum and maximum salary allowed for different JOB ID values. You are asked to write code to ensure that employees' salaries fall in the range allowed for their job type, for insert and update operations.Discuss the difference between triggers and stored procedures.
- Discuss the differences between triggers and stored procedures.You have a list of all your contacts details that you would like to store in a database. Your goal is that when a record is inserted in contacts table, you also want this record to be stored (inserted) in a backup table. Assume you have the two tables created: CONTACTS and CONTACTS_BACKUP. These two (2) tables have the same records. The CONTACTS table have the following columns: CONTACT_ID (Primary_Key), FIRSTNAME, LASTNAME and MOBILE_NO. CONTACTS_ID FIRSTNAME LASTNAME MOBILE_NO 1 100 Princess Kim 813023895 2 101 Henry Packer 811257891 3 102 Petrus Johannes 855698712 4 103 Lukas Shilongo 832584691 The CONTACTS_BACKUP table have the same columns and records as the CONTACTS table. CONTACTS_ID FIRSTNAME LASTNAME MOBILE_NO 100 Princess Kim 813023895 2 101 Henry Packer 811257891 3 102 Petrus Johannes 855698712 4 103 Lukas Shilongo 832584691 You now need to keep both tables in sync so that when a record is inserted into the CONTACTS table it should automatically be inserted into…- Create a trigger that will insert new emp_no, salary, from_date and to_date into salaries table after a new employee record is inserted. Assume the new employee salary is 10000 and from_date is current date and to_date is “9999-01-01” - List the employees’ first names and salaries where their salary is above the average salary among the employees
- Create PHP Index that can generate qr code & web scanner to read qr information & display its log. Note: Don't forget to include mysql database.Using the film database you have, answer the following queries in your schema thenwrite them down in this paper. Question two:a) Convert the following for-cursor into: open, fetch, close one:DECLARECursor c1 is select table_name from user_tables;BEGINFOR tables IN c1 LOOPDBMS_OUT.PUT_LINE(tables.table_name);END LOOP;END; b) Create a trigger so that when user tries to update category table, new valuewon't take effect and old data will remain in the database. c) Create a function to return if a particular film has more than 10 actors in it ornot.Normalize the Index metadata connection and explain why you think it would be slower to use.