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Database Access

SQLite3 Database Operation

The following code careates SQLite3 database and registers contents in a CSV file.

import(csv)
import(sqlite3)

Person = struct(name:string, email:string,
                gender:string, age:number, birthday:string, mobile:string)

sqlite3.open('50records-en.sqlite3') {|db|
    db.exec(R'''
    create table people (
        name     text,
        email    text,
        gender   text,
        age      integer,
        birthday text,
        mobile   text
    )
    ''')
    people = Person * csv.readlines(open('50records-en.csv'))
    db.transaction {
        for (person in people) {
            db.exec("insert into people values ('%s', '%s', '%s', %d, '%s', '%s')" % \
                    person.tolist())
        }
    }
}

The code below extracts and prints information from a database that has been created by the program above.

import(sqlite3)

Person = struct(name:string, email:string,
                gender:string, age:number, birthday:string, mobile:string)
sqlite3.open('50records-en.sqlite3') {|db|
    people = Person * db.query('select * from people')
    println(people)
}

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