What types of SQL queries can you create and use in practice?

In practice with SQL queries, the following types are usually used:

• SELECT — for retrieving data from tables.
• INSERT — for adding new records.
• UPDATE — for modifying existing data.
• DELETE — for deleting records.
• JOIN — for combining data from multiple tables.
• CREATE TABLE — for creating new tables.
• ALTER TABLE — for modifying the structure of tables.

Example of a simple SELECT query in Go using database/sql:

rows, err := db.Query("SELECT id, name FROM users WHERE active = ?", true)
if err != nil {
    log.Fatal(err)
}
for rows.Next() {
    var id int
    var name string
    err = rows.Scan(&id, &name)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(id, name)
}