Oracle Corporation (NYSE: ORCL) has raised its annual dividend for a twelfth straight year, lifting the per-share payout from $1.70 to $2.00, with the most recent quarterly distribution of $0.50 paid on July 24. The yield for regular shareholders sits at a modest 1.3% to 1.4%, but the underlying dividend metrics tell a more comfortable story about sustainability. Oracle’s payout ratio sits in the mid-30% range, and dividend coverage of approxima…