摘要： 1. In SQL, we can use count in the query to get the number of a column in the table. query = "select count(birth_rate) from facts;" 2. Also, we can us 阅读全文

摘要： Querying SQLite from Python 1. We use connect() in the library sqlite3 to connect the database we would like to query. Once it is connected, the targe 阅读全文

摘要： SQL And Database: 1.SQL query is to request the data from the database. 2.We use SELECT command to pick the specific column from the database. SELECT 阅读全文