Which command deletes an index?
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Which command deletes an index?
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- How do you create an index? How do you create a unique index? What is the difference between an index and a unique index?What is the format of the SET clause that changes the value in a column to null in an UPDATE command?Which of the following commands can you use to modify an index? MODIFY INDEX ALTER TABLE none of the above ALTER SESSION ALTER INDEX
- 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.in sql If you have not yet used the COMMIT command to store the changes permanently in the database, you can restore the database to its previous condition with the ROLLBACK command. Select one: a. True b. FalseWhich of the following functions can be used to include NULL values in calculations? (refer to the tables in the JustLee Books database.)a. SUMb. NVLc. MAXd. MIN
- When does Oracle 12c automatically generate an index for a table that it has been given access to?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 tableplz quickly ?????????????? /*Inserting into patient table*/ INSERT INTO patientVALUES ('1234','Kim Minji','06-05-1994','0557375017'); INSERT INTO patientVALUES ('1334','Han Sohee','06-07-1996','0567374017'); INSERT INTO patientVALUES ('1434','Jeon soyeon','07-10-1998','0537372017'); INSERT INTO patientVALUES ('1646','Lee Taemin','18-06-1993','0501346257'); INSERT INTO patientVALUES ('1645','Yu jimin','11-09-2000','0501846257'); select*from patient; /*Inserting into Doctor table*/INSERT INTO DOCTOR VALUES(2000432, 'khaled' , '05-12-1994' , 0556677880,'Dermatologists'); INSERT INTO DOCTOR VALUES(2000509, 'Ali' , '09-01-2000' , 0559918100, 'Dentistry'); INSERT INTO DOCTOR VALUES(2000389, 'Lewis' ,'21-01-1996' , 0559910000,'Family Physicians'); INSERT INTO DOCTOR VALUES(2000504, 'Saleh' ,'16-06-1998' , 055611500,'Family Physicians'); INSERT INTO DOCTOR VALUES(2000235, 'sara' ,'22-06-1998', 0557745500,'Orthopedics'); select *from doctor; /*Inserting into appointment table*/ INSERT INTO…
- When does Oracle 12c automatically create an index for a table?Which of the following data dictionary objects should be used to view information about the constraints in a database? ( refer to the tables in the JustLee Books database). a. USER_TABLES b. USER_RULES c. USER_COLUMNS d. USER_CONSTRAINTS e. None of the above objects should be usedWhich of the following commands can you use to modify an index?a. ALTER SESSIONb. ALTER TABLEc. MODIFY INDEXd. ALTER INDEXe. none of the above