24. Select
user
id username name nickname
1 ensky 林宏昱 小天
2 Jalex 張哲彬 啪啪啪 username
3 fancy0305 羅宛琪 重訓一姊 ensky
Jalex
SELECT * FROM `user` fancy0305
SELECT `username` FROM `user`
SELECT `id`, `username` FROM `user`
id username
1 ensky
2 Jalex
3 fancy0305
25. Select Order By
user
id username name nickname
1 ensky 林宏昱 小天
2 Jalex 張哲彬 啪啪啪
3 fancy0305 羅宛琪 重訓一姊
id username name nickname
SELECT * FROM `user` 1 ensky 林宏昱 小天
ORDER BY username 3 fancy0305 羅宛琪 重訓一姊
2 Jalex 張哲彬 啪啪啪
SELECT * FROM `user` id username name nickname
2 Jalex
ORDER BY username DESC 張哲彬 啪啪啪
3 fancy0305 羅宛琪 重訓一姊
1 ensky 林宏昱 小天
26. Select Where
user
id username name nickname
1 ensky 林宏昱 小天
2 Jalex 張哲彬 啪啪啪
3 fancy0305 羅宛琪 重訓一姊
SELECT name FROM `user`
name
WHERE `username` = "ensky" 林宏昱
SELECT username, nickname FROM `user`
WHERE `username` = "ensky"
username nickname
OR `username` = "Jalex" ensky 小天
Jalex 啪啪啪
27. Select Limit
id username name nickname
SELECT * FROM `user` 1 ensky 林宏昱 小天
2 Jalex 張哲彬 啪啪啪
3 fancy0305
SELECT * FROM `user`
羅宛琪 重訓一姊
id username name nickname
LIMIT 1
1 ensky 林宏昱 小天
SELECT * FROM `user` id username name nickname
LIMIT 1, 2 2 Jalex 張哲彬 啪啪啪
3 fancy0305 羅宛琪 重訓一姊
SELECT * FROM `user`
id username name nickname
LIMIT 2, 1 3 fancy0305 羅宛琪 重訓一姊