How Can I Use a Python List as a Parameter in an SQL Query?

Utilizing Python Lists as Parameters in SQL Queries

In Python, you may encounter the need to use a list as a parameter in an SQL query. For instance, if you have a list containing identifiers, you might want to retrieve data based on those identifiers. Here's a solution to achieve this:

You can incorporate parameterised queries into your approach. This method is versatile and works effectively with both integer and string values. Here's how you can implement it:

placeholder = '?'  # For SQLite. Refer to DBAPI paramstyle for other DBs.
placeholders = ', '.join(placeholder * len(l))
query = 'SELECT name FROM students WHERE id IN (%s)' % placeholders
cursor.execute(query, l)

In this code:

• placeholder is the placeholder character used to represent a parameter in the SQL query. It can vary depending on the database being utilized.
• placeholders is a string containing the necessary number of placeholders for the list items, joined by commas.
• query is the formatted SQL query with placeholders.
• Finally, cursor.execute(query, l) executes the query, passing the list as a tuple to the placeholder variables.

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