
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Discuss the CRUD operations supported by the SQLiteOpenHelper and SQLiteCursor classes.
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- Task 3: The InstantRide Finance team wants to collect the price and discount information with the driver names for each travel in the system. You need to return the TRAVEL_ID, DRIVER_FIRST_NAME, DRIVER_LAST_NAME, TRAVEL_PRICE, and TRAVEL_DISCOUNT information from the TRAVELS and DRIVERS tables combined over DRIVER_ID field with the ON keyword. Task: Calculate each user's price and discount information. (SQL Database Test)arrow_forwardEXAMINE THE TRIGGER BELOW IS IT CORRECT? IF NOT MODIFY Create test to show that the triggers are correctly implemented, do the following: Truncate the Transaction table Reset the Tx_Nbr sequence back to 1 Update the Account table, setting the Balance back to zero Re-run the INSERT statements for the transactions Use simple queries to demonstrate that the results in the Transaction and Account tables are as expected GIVEN THE TRIGGER BELOW: Trigger to enforce the referential integrity for the Transaction Ref_Nbr: Deposit or Withdrawal transaction to Bank Branch Bill Payment, Debit Purchase, or Return transaction to Merchant CREATE TRIGGER Transaction_RefNbr_Check BEFORE INSERT OR UPDATE ON Transactions FOR EACH ROW DECLARE TxRefNbr_count INTEGER; BEGIN IF:NEW.TxTypeCode = ‘D’ OR :NEW.TxTypeCode = ‘W’ THEN SELECT COUNT(*)INTO TxRefNbr_count FROM BRANCH WHERE BranchNbr=:NEW.RefNbr; IF TxRefNbr_count = 0 THEN…arrow_forwardProvide an overview of the SQLiteOpenHelper and SQLiteCursor classes, as well as how they are utilized in CRUD operations.arrow_forward
- USER_ID USER_FIRST_NAME USER_LAST_NAME USER_EMAIL 3001 Jack Hill j.hill@xmail.com 3002 Ryan Collins r.collins@xmail.com 3003 Nursin Yilmaz n.atak@gmail.com 3004 Sarah Price s.price@xmail.com 3005 Bobby Griffin b.griffin@xmail.com 3006 Randy Clark r.clark@xmail.com 3007 Jose Thomas j.thomas@xmail.com 3008 Nursin Yilmaz n.yilmaz@xmail.comarrow_forwardTask 3: The Marketing team wants to collect emails of the users on InstantStay. However, the team needs a SQL statement to execute inside their programming environment. You need to create a statement that they can easily run the EXECUTE command to return a single column table containing the USER_EMAIL addresses. Task: Create a prepared statement for use with the EXECUTE command.arrow_forward. Write a T-SQL correlated subquery selecting the store code, store name, store ytd sales from the store table where the store code matches the selection result of the max store code from the store table where the store code matches. /* Created with SQL Script Builder v.1.5 */ /* Type of SQL : SQL Server */ CREATE TABLE EMPLOYEE ( EMP_CODE int, EMP_TITLE varchar(4), EMP_LNAME varchar(15), EMP_FNAME varchar(15), EMP_INITIAL varchar(1), EMP_DOB datetime, JOB_CODE varchar(5), STORE_CODE int ); INSERT INTO EMPLOYEE VALUES('1','Mr.','Williamson','John','W','5/21/1964','SEC','3'); INSERT INTO EMPLOYEE VALUES('2','Ms.','Ratula','Nancy','','2/9/1969','MGR','2'); INSERT INTO EMPLOYEE VALUES('3','Ms.','Greenboro','Lottie','R','10/2/1961','GEN','4'); INSERT INTO EMPLOYEE VALUES('4','Mrs.','Rumpersfro','Jennie','S','6/1/1971','GEN','5'); INSERT INTO EMPLOYEE VALUES('5','Mr.','Smith','Robert','L','11/23/1959','GEN','3'); INSERT INTO EMPLOYEE…arrow_forward
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