which DML keyword is used to make change to existing records in a table? a) Insert b) Select c) Update d) Delete
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which DML keyword is used to make change to existing records in a table?
a) Insert
b) Select
c) Update
d) Delete
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- The previous administrator created a table named CONTACTS, which contains outdated data. You want to remove the table and its data from the database. Which statement should you issue? which one will it be a. DELETE b. ALTER TABLE c. TRUNCATE TABLE d. DROP TABLEWhich clause is used to change a column in a table? a. SET b. MODIFY c. ALTER d. UPDATEWhich of the following keywords allows the user to delete a record from a table, even if rows in another table reference the record through a FOREIGN KEY constraint? ( refer to the tables in the JustLee Books database). a. CASCADE b. CASCADE ON DELETE c. DELETE ON CASCADE d. DROP e. ON DELETE CASCADE
- 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 tableTask 4: The Driver Relationship team wants to have quick search options for the active drivers. The team specifically mentioned that they are using first name, last name and driving license ID to search the drivers. Create an index called NameSearch on the ACTIVE_DRIVERS table created in task 3. ASNWER IN MYSQL PLEASEForms offer a front-end to database users to enter data into a table, or multiple tables, and may contain buttons to switch between records, add new records, or search for records. True False Which of the following answers most closely represents a constraint on a table? A. A list of values that are preferred but not required for a row B. A rule for a particular row that limits the values that can exist within it C. A rule for a particular column that limits the values that can exist within it D. A list of values that are preferred but not required for a column
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