what is insert anomaly, Update anomaly, and Delete anomaly
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Q: What exactly is meant by the terms "insert anomaly," "update anomaly," and "delete anomaly"?
A: Answer the above question are as follows
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what is insert anomaly, Update
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- What are the INSERT TRIGGER, DELETE TRIGGER and UPDATE TRIGGER. Explain with examples.How would the index change after replacing 107 with 104, and adding an additional entry to the base index with key value 155?Indexing can clearly be very beneficial. Why should younot create an index for every column of every table of yourdatabase?
- Create a set of lookup tables.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.• Using the MySQL client: o Create a new table in the dogs_db database called student (id int, name varchar(50), grade float); o Insert the following 3 new rows into the student table: id 55 66 77 name Carl Davis Dennis Fredrickson Jane Richards grade 61 88 78 O Select all records with a grade between 60 and 80. o Change Carl Davis's grade to 65. o Delete Dennis Fredrickson's row. o Change the grade of all people with an id greater than 55 to 80. • After executing each instruction given above, take a screenshot of your console and place it in a document to send in for review. Number your screenshots 1 to 5 in order of execution. • Modify the Java program Main.java to set the qty for Introduction to Java to 0. • Modify the Java program Main.java to delete all books with id > 8000; and insert: (8001, 'Java ABC', 'Kevin Jones', 3) and (8002, 'Java XYZ', 'Kevin Jones', 5);
- Create the same City Database that you created in the first question using Hash table. Add another attribute in the City record, that is, city_id. Use city_id to compute the hashing. Implment member functions to insert, delete, search and display city records. Use the chained hashing to resolve the collision issue. ------------------------------------------------------------------------- so here is my out put from the first question #include <iostream>#include <string>#include <cmath> using namespace std; struct city{string name;int x;int y;city *left;city *right;bool deleted;}; class database{private:city *root;void insert(city *&temp, string name, int x, int y){if(temp == NULL){temp = new city();temp->name = name;temp->x = x;temp->y = y;temp->left = NULL;temp->right = NULL;temp->deleted = false;}else{if(name < temp->name){insert(temp->left, name, x, y);}else if(name > temp->name){insert(temp->right, name, x,…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…Try switching the joins pthread_join(tid2, NULL); pthread_join(tid1, NULL); Do you see any difference? Please report if and why you do or do not see any difference in terms of the randomness in the result of the shared resource. In the inc_dec_resource() function, implement mutual exclusion (pthread_mutex_lock) to ensure that the result becomes 0 every time when you execute your program. Put your updated code in the report (highlighted) and show your screenshot of the execution by running the script three time using $ time ./shared_resource_mutex. Hint: Your loop is incrementing/decrementing the resource which should be protected by each thread while it is executing that portion. /* Compile: gcc -o shared_resouce_mutex shared_resource_mutex.c -lpthread Execute: ./shared_resource_mutex */ #include <stdio.h> #include <pthread.h> #define iterations 300000000 long long shared_resource = 0; pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; // Thread function to…