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CIS 407 final Exam Questions and answers, Graded A+/ 2024/25 Exam PREDICTOR PAPER $10.49   Add to cart
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CIS 407 final Exam Questions and answers, Graded A+/ 2024/25 Exam PREDICTOR PAPER
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CIS 407 final Exam Questions and answers, Graded A+ What is the difference between DDL, DML, and DCL? Examples? - -DDL (data definition language) = define and manage structure of the database ex. create, alter, drop table DML (data manipulation language) = manipulate data ex. insert into t...

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  • December 24, 2023
  • 16
  • 2023/2024
  • Exam (elaborations)
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CIS 407 final Exam Questions and
answers, Graded A+

What is the difference between DDL, DML, and DCL? Examples? - ✔✔-DDL (data definition language) =

define and manage structure of the database




ex. create, alter, drop table




DML (data manipulation language) = manipulate data




ex. insert into table, update, delete from




DCL (data control language) = controls access to data




ex. grant, revoke




How to create a table in SQL - ✔✔-CREATE TABLE name (




how to alter a table in SQL - ✔✔-ALTER TABLE name

,alters table structure




how to drop a table in SQL - ✔✔-DROP TABLE name;




How to insert data into a table - ✔✔-INSERT INTO name (columns being inserted into)


VALUES (values inserted)




adds records




how to delete data in a table - ✔✔-DELETE FROM name




removes records




How to Update data (SQL) - ✔✔-UPDATE name




modifies existing records

, how to create relationships among tables - ✔✔-using foreign keys




Foreign Key (TableANum) REFERENCES TableA (TableANum),Foreign Key (TableBID) REFERENCES TableB

(TableBID))




how to add column or table constraints - ✔✔-ALTER TABLE Name


ADD new_column data_type


ALTER COLUMN column_name new_data_type


DROP COLUMN column_name




how to reverse commands - ✔✔-ALTER, DELETE FROM, UPDATE




what are the different data types - ✔✔-tinyint


smallint


Int


decimal (p,s)


date: YYYY-MM-DD char(n): where char(10) means a fixed length of 10 characters and missing characters

filled with blank spaces

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