I am creating a college event database in MySQL and I want to add a check constraint that prevents two events from overlapping. But when I execute the following constraint I get an error that says: "Error Code: 3815. An expression of a check constraint 'events_chk_1' contains disallowed function." ALTER TABLE Events ADD CHECK (NOT EXISTS (SELECT *                          FROM Events E                         WHERE (E.LocID=LocID) AND (E.Date=Date)                          AND ((End-E.Start) > 0) AND ((E.End-Start) > 0)))   What is causing this error

Q: ntacts Database) Study the books.sql script provided in the ch17 examples folder's sql subfolder.…

A: Answer is below:

Q: It is recommended that the information found in Types.txt be imported into the BOOK TYPE database in…

A: There must be one entry on each line of the Types.txt text file that you generate, and each value…

Q: To show a single row function in a database, we used the function named "single row". Scalar…

A: The difference between a scalar and a vector is as follows: Scalar quantities differ from vector…

Q: DECLARE CURSOR C_pilot IS SELECT pilot_no, total_hours FROM pilot; pilot.pilot no&TYPE; v_pilot_no…

A: Below i have given the code:

Q: HAR2(5) FIRST_NAME    VARCHAR2(25) LAST_NAME    VARCHAR2(25)

A: DECLARE  CURSOR c   IS      SELECT        FIRSTNAME, LASTNAME, PHONE      FROM       instructor…

Q: Update this database with the following stored modules and submit the updated

A: The user is tasked with updating a database, "CompanyDB.sql," by incorporating stored procedures,…

Q: what point is it appropriate to build an index by hand

A: Here have to determine about doing index by hand.

Q: difference between a void pointer and a NULL pointer: Provide relevant instances to back up your…

A: difference between a void pointer and a NULL pointer: Provide relevant instances to back up your…

Q: Consider the following database: Students name rim sara milad tarek lastname age 19 18 21 18 Select…

A:

Q: Use import sys. Use the german_credit_data.csv file to complete the following assignment. Create a…

A: The solution to the given question is: PYTHON CODE: import pandas as pd import statsmodels.api as sm…

Q: Map a lambda function onto the 'name' column to capitalize all the president names in the DataFrame…

A: ans = [x.upper() for x in df.name] df = dataframe  x.upper() for x in df.name = it will change each…

Q: Specifically, we utilized the "single row" method to display a single row from a database. Scalar…

A: - We need to talk about our choice of function to display required data.

Q: 10. Create a B-tree index on the customer’s Lastname column. Verify that the index exists by…

A: Answer:                   Users can create a B-Tree index on the customers' table lastname column,…

Q: what is Aggregate operator ?

A: Aggregation operator: It performs mathematical operations like Count, Min, Max, Aggregate, Sum, and…

Q: The function below, get_value_if_key, takes two arguments: the dictionary data_dict and a key of any…

A: In Python, to access all the available keys in the dictionary, keys() method is used. It returns a…

Q: I: 'Mr./Mrs '|| Iname||', '||fname as full_Name II: concat('Mr./Mrs ', Iname, fname) as full_Name I…

A: Answer of above two questions mentioned below:-

Q: Define the function print_trophic_class_summary(tli3_values) that accepts a list of trophic level…

A: Note : since programming language is not mentioned we are providing solution in Python Programming…

Q: Just what is the function of the delete operator?

A: Operators: In computer science, an operator is a character or characters who decide which action to…

Q: 1. The folowing code will cause error during execution. What is the reason? import pandas as pd data…

A: The following code will cause error during execution. What is the reason? import pandas as pd data…