SQL solution beginner freindly with deep explaination.
Let\'s break down the task step-by-step.\n\n## Intuition\nThe problem requires us to retrieve records of patients who have a condition starting with "DIAB1". Th
Let\'s break down the task step-by-step.\n\n## Intuition\nThe problem requires us to retrieve records of patients who have a condition starting with "DIAB1". The wildcard character `%` is used in SQL to represent zero or more characters. By using this character in our `LIKE` clause, we can match any condition that starts with "DIAB1" or has "DIAB1" somewhere in the middle or end.\n\n## Approach\n1. **Understand the requirements**: We need to query the `Patients` table for records where the `conditions` field contains the condition "DIAB1" at the beginning or anywhere else in the string.\n2. **Formulate the SQL query**:\n   - Use the `LIKE` operator to match conditions that start with "DIAB1".\n   - Use `OR` to account for conditions that have "DIAB1" anywhere in the string.\n   - Ensure we are checking for the space before "DIAB1" when it is not at the beginning.\n3. **Write the SQL query**: Combine the above points into a single SQL statement.\n\n## Complexity\n- **Time complexity**: The time complexity depends on the number of records in the `Patients` table. In the worst case, each row\'s `conditions` field needs to be checked, leading to a complexity of \\(O(n)\\), where \\(n\\) is the number of rows in the table.\n- **Space complexity**: The space complexity is \\(O(1)\\) as no additional space proportional to the input size is required.\n\n## Code\n```sql\nSELECT patient_id, patient_name, conditions\nFROM Patients\nWHERE conditions LIKE \'DIAB1%\' OR conditions LIKE \'% DIAB1%\';\n```\n\nThis query selects the `patient_id`, `patient_name`, and `conditions` from the `Patients` table where the `conditions` column starts with "DIAB1" or contains " DIAB1" (preceded by a space) anywhere in the string. This approach ensures we capture all relevant records based on the problem\'s requirements.
['MySQL']