Holier Than Thou - Biblical Contradictions

Did David capture 1,700 or 7,000 horsemen from Hadadezer king of Zobah?

2 Samuel 8:4, "David captured from him 1,700 horsemen and 20,000 foot soldiers; and David hamstrung the chariot horses, but reserved enough of them for 100 chariots." (NASB)

1 Chronicles 18:4, "David took from him 1,000 chariots and 7,000 horsemen and 20,000 foot soldiers, and David hamstrung all the chariot horses, but reserved enough of them for 100 chariots." (NASB)

According to 2 Samuel 8:4, David captured 1,700 horsemen and 20,000 foot soldiers from King Hadadezer, however, according to the same account in 1 Chronicles 18:4, David captured 7,000 horsemen and 20,000 foot soldiers.

"Sorrow is better than laughter: for by the sadness of the countenance the heart is made better. The heart of the wise is in the house of mourning; but the heart of fools is in the house of mirth." (Ecclesiastes 7:3-4, KJV)

"Then I commended mirth, because a man hath no better thing under the sun, than to eat, and to drink, and to be merry: for that shall abide with him of his labour the days of his life, which God giveth him under the sun." (Ecclesiastes 8:15, KJV)