The following locking levels will be discussed: Page-level Row-level
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The following locking levels will be discussed:
Page-level Row-level
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- Discuss the following locking levels: Page-level Row-levelDiscuss the following locking levels in detailed explanation1 Page-level2 Row-levelStep 2: Create the insertartist.php file Create the insertartist.php file that takes the data from the artist.html form, connects to the database, and successfully inserts the data into the artist table. A message should be displayed to confirm that the record has been added.
- Please define the primary difference between User rights and File level rights.Write, but do not execute, the commands to grant the following privileges: a. User Ashton must be able to retrieve data from the ITEM table. b. Users Kelly and Morgan must be able to add new orders and order lines. c. User James must be able to change the price for all items. d. User Danielson must be able to delete customers. e. All users must be able to retrieve each customers number, name, street, city, state,and postal code. f. f User Pere7 must be able to create an index on the ORDFRS table. g. User Washington must be able to change the structure of the ITEM table. h. User Grinstead must have all privileges on the ORDERS table.There are three tables in this database (see image). Write MYSQL code for: (1) Create a trigger “insert_inventory” on table “Inventory”. The trigger is fired after a row is inserted in table “Inventory”. After a row is inserted in table “inventory”, the “itemid”, the insertion time, and the action is inserted in table “Inventory_history”. The action is set to ‘add an item’. The oldprice is set to null. Test your trigger by inserting a row into Inventory and displaying the contents of Inventory_history. (2) Create a trigger “change_quantity” on table “Transaction”. The trigger is fired after a row is inserted in table “Transaction”. After a row is inserted in table “Transaction”, update the “quantity” in table “Inventory”. For example, if 3 iWatch are sold, then the quantity of iWatch in table “Inventory” is decreased by 3. Test your trigger by inserting a row into Transaction and displaying the contents of the relevant row in Inventory. (3) Create a trigger “change_price” on table…
- which key is used Link records of one type with those of another type.which object can be used to speed up searches and quires in general? a) Index b) Unique c) Check d) CascadeComplete the Python program below to display the name of the most recently added dataset and collect the total number of datasets currently listed on the URL provided below. !pip install cssselect from lxml import htmlimport requestsresponse = requests.get('http://catalog.data.gov/dataset?q=&sort=metadata_created+desc')doc = #TO DO -- Complete the Codetitle = #TO DO -- Complete the Codeprint("The name of the most recently added dataset on data.gov:")print(title.strip()) response1 = requests.get('http://www.data.gov/')doc_gov = #TO DO -- Complete the Codelink_gov = #TO DO -- Complete the Codeprint("Number of datasets currently listed on data.gov:")print(link_gov.text) *OUTPUT TEXT: * The name of the most recently added dataset on data.gov: Canterbury, New Zealand 2018 Number of datasets currently listed on data.gov: 224,654 datasets
- CREATE TABLE ARTISTS( artist_id CHAR(30), artist_name CHAR(30), artist_pop INT(5), PRIMARY KEY (artist_id)); CREATE TABLE TRACKS( track_id CHAR(30), track_name CHAR(30), duration INTL(10), tempo REAL, PRIMARY KEY (track_id)); CREATE TABLE USERS( user_id CHAR(30), user_name CHAR(30), age INT(5), nationality CHAR(30), num_track_listened INT(10), PRIMARY KEY (user_id)); CREATE TABLE RECORD( artist_id CHAR(30), track_id CHAR(30), PRIMARY KEY (artist_id, track_id), FOREIGN KEY (artist_id) REFERENCES ARTISTS, FOREIGN KEY (track_id) REFERENCES TRACKS); CREATE TABLE LISTEN( user_id CHAR(30), track_id CHAR(30), PRIMARY KEY (user_id, track_id), FOREIGN KEY (user_id) REFERENCES USERS, FOREIGN KEY (track_id) REFERENCES TRACKS); CREATE TABLE FOLLOW( user_id CHAR(30), artist_id CHAR(30), follow_date datetime, PRIMARY KEY (user_id, artist_id) FOREIGN KEY (user_id) REFERENCES USERS, FOREIGN KEY (artist_id) REFERENCES ARTISTS); According to the six table, write a single SQL…CREATE TABLE ARTISTS( artist_id CHAR(30), artist_name CHAR(30), artist_pop INT(5), PRIMARY KEY (artist_id)); CREATE TABLE TRACKS( track_id CHAR(30), track_name CHAR(30), duration INTL(10), tempo REAL, PRIMARY KEY (track_id)); CREATE TABLE USERS( user_id CHAR(30), user_name CHAR(30), age INT(5), nationality CHAR(30), num_track_listened INT(10), PRIMARY KEY (user_id)); CREATE TABLE RECORD( artist_id CHAR(30), track_id CHAR(30), PRIMARY KEY (artist_id, track_id), FOREIGN KEY (artist_id) REFERENCES ARTISTS, FOREIGN KEY (track_id) REFERENCES TRACKS); CREATE TABLE LISTEN( user_id CHAR(30), track_id CHAR(30), PRIMARY KEY (user_id, track_id), FOREIGN KEY (user_id) REFERENCES USERS, FOREIGN KEY (track_id) REFERENCES TRACKS); CREATE TABLE FOLLOW( user_id CHAR(30), artist_id CHAR(30), follow_date datetime, PRIMARY KEY (user_id, artist_id) FOREIGN KEY (user_id) REFERENCES USERS, FOREIGN KEY (artist_id) REFERENCES ARTISTS); According to the six table, write a single SQL…CREATE TABLE ARTISTS( artist_id CHAR(30), artist_name CHAR(30), artist_pop INT(5), PRIMARY KEY (artist_id)); CREATE TABLE TRACKS( track_id CHAR(30), track_name CHAR(30), duration INTL(10), tempo REAL, PRIMARY KEY (track_id)); CREATE TABLE USERS( user_id CHAR(30), user_name CHAR(30), age INT(5), nationality CHAR(30), num_track_listened INT(10), PRIMARY KEY (user_id)); CREATE TABLE RECORD( artist_id CHAR(30), track_id CHAR(30), PRIMARY KEY (artist_id, track_id), FOREIGN KEY (artist_id) REFERENCES ARTISTS, FOREIGN KEY (track_id) REFERENCES TRACKS); CREATE TABLE LISTEN( user_id CHAR(30), track_id CHAR(30), PRIMARY KEY (user_id, track_id), FOREIGN KEY (user_id) REFERENCES USERS, FOREIGN KEY (track_id) REFERENCES TRACKS); CREATE TABLE FOLLOW( user_id CHAR(30), artist_id CHAR(30), follow_date datetime, PRIMARY KEY (user_id, artist_id) FOREIGN KEY (user_id) REFERENCES USERS, FOREIGN KEY (artist_id) REFERENCES ARTISTS); Based on the six tables above, write a single SQL…
