1) Patient—PatientID, Name, DOB 2) Doctor—DoctorID, Name, MedLicenseNumber, Phone 3) Medication—MedicationID, BrandName, GenericName 4) Prescription—PrescriptionID, Date, PatientID, PrescriberID, MedicationID Specify the SQL queries to retrieve: 1) A list of all doctors. 2) The number of patients that were born before 01/01/1994. 3) The patient information along with the ID of any prescribing doctor for each patient. 4) The prescription information along with patient name, DOB, medication brand name, and prescribing doctor name sorted by most recent date.
To retrieve the requested information using SQL queries, we need to utilize the SELECT statement along with appropriate joins and conditions. Let’s discuss how to execute each query.
1) A list of all doctors:
To retrieve a list of all doctors, we need to select the columns “DoctorID” and “Name” from the “Doctor” table. The SQL query for this would be:
SELECT DoctorID, Name
FROM Doctor;
2) The number of patients that were born before 01/01/1994:
To determine the number of patients who were born before January 1, 1994, we need to count the number of records in the “Patient” table that meet the specified condition. The SQL query for this would be:
SELECT COUNT(*)
FROM Patient
WHERE DOB < '1994-01-01';
Note: Please ensure that the date format in your database matches the format 'YYYY-MM-DD'.
3) The patient information along with the ID of any prescribing doctor for each patient:
To retrieve the patient information along with the ID of the prescribing doctor for each patient, we need to combine data from the "Patient" and "Prescription" tables. The primary key "PrescriberID" in the "Prescription" table references the "DoctorID" in the "Doctor" table. Therefore, we can use an INNER JOIN to connect the related data. The SQL query for this would be:
SELECT Patient.*, Prescription.PrescriberID
FROM Patient
INNER JOIN Prescription ON Patient.PatientID = Prescription.PatientID;
Note: The symbol "*" denotes selecting all columns from the "Patient" table. Please modify the query if you want to select specific columns.
4) The prescription information along with patient name, DOB, medication brand name, and prescribing doctor name sorted by the most recent date:
To retrieve the prescription information along with patient name, date of birth (DOB), medication brand name, and prescribing doctor name sorted by the most recent date, we would need to combine data from the "Prescription," "Patient," "Medication," and "Doctor" tables through appropriate JOIN statements. The SQL query for this would be:
SELECT Prescription.*, Patient.Name AS PatientName, Patient.DOB, Medication.BrandName, Doctor.Name AS DoctorName
FROM Prescription
INNER JOIN Patient ON Prescription.PatientID = Patient.PatientID
INNER JOIN Medication ON Prescription.MedicationID = Medication.MedicationID
INNER JOIN Doctor ON Prescription.PrescriberID = Doctor.DoctorID
ORDER BY Prescription.Date DESC;
Note: In the above query, we have used aliasing by assigning unique names to columns from different tables for clarity and to avoid ambiguity.
By executing these SQL queries, you should be able to retrieve the requested information from the given database schema. However, please note that the syntax and table/column names may vary depending on your specific database management system.