| SQL | -- Connect string format: [username]/[password]@//[hostname]:[port]/[DB service name] [AS SYSDBA]
-- To connect to the Container Database (CDB) use:
sqlplus sys/[Password]@//localhost:1521/XE as sysdba
-- To connect to the first Pluggable Database (PDB) use:
sqlplus sys/[Password]@//localhost:1521/XEPDB1 as sysdba |
| Java | OracleDataSource ods = new OracleDataSource();
ods.setURL("jdbc:oracle:thin:@//localhost:1521/XEPDB1"); // jdbc:oracle:thin@//[hostname]:[port]/[DB service name]
ods.setUser("[Username]");
ods.setPassword("[Password]");
Connection conn = ods.getConnection();
PreparedStatement stmt = conn.prepareStatement("SELECT 'Hello World!' FROM dual");
ResultSet rslt = stmt.executeQuery();
while (rslt.next()) {
System.out.println(rslt.getString(1));
} |
| Python | import cx_Oracle
# Connect string format: [username]/[password]@//[hostname]:[port]/[DB service name]
conn = cx_Oracle.connect("[Username]/[Password]@//localhost:1521/XEPDB1")
cur = conn.cursor()
cur.execute("SELECT 'Hello World!' FROM dual")
res = cur.fetchall()
print(res) |
| Node.js | var oracledb = require('oracledb');
async function run() {
let connection = await oracledb.getConnection( {
user : "[Username]",
password : "[Password]",
connectString : "localhost:1521/XEPDB1" // [hostname]:[port]/[DB service name]
});
let result = await connection.execute( "SELECT 'Hello World!' FROM dual");
console.log(result.rows[0]);
}
run(); |
| C# / .NET | // Connection string format: User Id=[username];Password=[password];Data Source=[hostname]:[port]/[DB service name];
OracleConnection con = new OracleConnection("User Id=[Username];Password=[Password];Data
Source=localhost:1521/XEPDB1;");
con.Open();
OracleCommand cmd = con.CreateCommand();
cmd.CommandText = "SELECT \'Hello World!\' FROM dual";
OracleDataReader reader = cmd.ExecuteReader();
reader.Read();
Console.WriteLine(reader.GetString(0)); |
| PHP | // [username], [password], //[hostname]:[port]/[DB service name]
$c = oci_pconnect("[Username]", "[Password]", "//localhost:1521/XEPDB1");
$s = oci_parse($c, "SELECT 'Hello World!' FROM dual");
oci_execute($s);
oci_fetch_all($s, $res);
echo "<pre>\n"
var_dump($res);
echo "</pre>\n"; |
| Ruby | require 'oci8'
// "[username]/[password]@//[hostname]:[port]/[DB service name]"
con = OCI8.new("[Username]/[Password]@//localhost:1521/XEPDB1")
statement = "SELECT 'Hello World!' FROM dual"
cursor = con.parse(statement)
cursor.exec
cursor.fetch do |row|
print row
end |
| Go | package main
import (
"fmt"
"log"
"database/sql"
_ "github.com/godror/godror"
)
func main() {
// connectString format: [hostname]:[port]/[DB service name]
dsn := `user="[Username]"
password="[Password]"
connectString="localhost:1521/XEPDB1"`
db, err := sql.Open("godror", dsn)
if err != nil {
panic(err)
}
defer db.Close()
rows, err := db.Query("SELECT 'Hello World!' FROM dual")
if err != nil {
panic(err)
}
defer rows.Close()
var strVal string
for rows.Next() {
err := rows.Scan(&strVal)
if err != nil {
log.Fatal(err)
}
fmt.Println(strVal)
}
err = rows.Err()
if err != nil {
log.Fatal(err)
}
} |
