çè«ããå¦ã¶ãã¼ã¿ãã¼ã¹å®è·µå ¥é ~ãªã¬ã¼ã·ã§ãã«ã¢ãã«ã«ããå¹ççãªSQL (WEB+DB PRESS plus) ä½è :奥é å¹¹ä¹æè¡è©è«ç¤¾Amazon ç©ãèªã«å ¥ã£ã¦ããã®ã§èªãã ã ãã®æ¬ã¯ãªã¬ã¼ã·ã§ãã«ã¢ãã«ãç解ãããã¨ã«ãã£ã¦RDBã®ç¥èãæ·±ãããã¨ãããããªæ¬ãRDBãå®è·µã§ä½¿ã£ã¦ãã人ãããã«ç¥èãæ·±ããããã®æ¬ã¨ããæããå 容ã¨ãã¦ã¯éè¦ãªçè«ãRDBã¨ç´ä»ãããã¦è§£èª¬ããã¦ãã¦é¢ç½ãã£ããä¸æ¹ã§ãå°éç¨èªãæç« ä¸ã«å¤ã使ããã¦ãã¦ãå人çã«ã¯ä½ãé ã«å ¥ã£ã¦ããªãã£ãç¹ã¯æ®å¿µã ã£ãã ãã®æ¬ãèªã¿ãªããããããªãã¨ããã調ã¹ã¦ãã¦è¦ã¤ããã®ã ãã©ããã®æ¬ã®èè ã®æã®çºè¡¨è³æã§ããããã¼ã¿ãã¼ã¹è¨è¨å¾¹åºæåï¼ï¼ãããã®æ¬ã®ç«¯çãªã¾ã¨ãã«ãªã£ã¦ãã¦ããããé常ã«è¯ãè³æãªã®ã§æ¬å½ã«ãããããæ¬ã§ç´¹ä»ããã¦ãããªã¬ã¼ã·ã§ãã«ã¢ãã«ãæ£è¦åçè«ãªã©ãããã15åç¨åº¦ã§ç解ã§ãã
ããã«ã¡ã¯ããµã¼ãã¹éçºé¨ã®èå¼ (@a_bicky) ã§ãã çªç¶ã§ãããRDBMS ã®æ¢åã®ãã¼ãã«ãè¦ã¦ã¿ãããä½ã§ãããªã«ã¤ã³ããã¯ã¹ã ãããªã®ï¼ãã¿ãããªçµé¨ã¯ããã¾ãããï¼ä¸è¦ãªã¤ã³ããã¯ã¹ã¯å®¹éãå§è¿«ããããæ¿å ¥ãé ããªã£ããã¨è¯ããã¨ãããã¾ããã ãããªããã§ãä»åã¯ã¬ã³ã¼ããæ¤ç´¢ããããã«å¿ è¦ãªã¤ã³ããã¯ã¹ã®åºç¤ç¥èã¨ãããè¦ãããä¸é©åãªã¤ã³ããã¯ã¹ã«ã¤ãã¦è§£èª¬ãã¾ããã¯ãã¯ãããã§ã¯ Rails ã®ãã¼ã¿ãã¼ã¹ã¨ãã¦ä¸»ã« MySQL 5.6ãMySQL ã®ã¹ãã¬ã¼ã¸ã¨ã³ã¸ã³ã¨ãã¦ä¸»ã« InnoDB ã使ã£ã¦ããã®ã§ãMySQL 5.6 ã® InnoDB ã«ã¤ãã¦è§£èª¬ãã¾ãã InnoDB ã®ã¤ã³ããã¯ã¹ã«é¢ããåºç¤ç¥è ã¤ã³ããã¯ã¹ã®æ§é (B+ æ¨) InnoDB ã§ã¯ B+ æ¨ã使ããã¦ãã¾ããB+ æ¨ã¯æ¬¡ã®ãããªç¹å¾´ãæã£ãæ¨æ§é ã§ãã 次æ°ã b ã¨ããã¨ã
10. æåéåæåéå US-ASCII æ°åãè±åã32åã®è¨å· JIS X 0201 US-ASCII(ããâãÂ¥ã/ã~ãâãâ¾ã)+ã«ã¿ã« ã JIS X 0208 æ°åãã²ãããªãã«ã¿ã«ããæ¼¢åãã©ãã³æåã ã®ãªã·ã£æåãè¨å·çã JIS X 0213 JIS X 0208 + 第ä¸æ°´æº/第åæ°´æºããã¼ãæ°åã é¼»æ¿é³æåçã 11. æåéåæåéå Windows-31J JIS X 0201 + JIS X 0208 + NECç¹æ®æå + IBM æ¡å¼µæå(ãâ§ããâ §ããã±ããé«ããï¨ããå½ ã ç) Unicode ä¸çä¸ã®æåãçµµæå(ã�����������������ãã�������������������ãç)ãå«ãã
ããã«æ¸ããã¨ã«ãã£ã¦éä¸ã§ãããããªãããã¡ã½ããã§ãã ããã«ã¼ãã¥ã¼ã¹ãçºãã¦ããã以ä¸ã®ãããªCSç³»è¬ç¾©åç»ã®ã¾ã¨ããªãã¸ããªãæµãã¦ãã¾ããã GitHub - Developer-Y/cs-video-courses: List of Computer Science courses with video lectures. ã¸ã¼ã£ã¨æããªããä½åãããã£ã¦ã¿ãã¨ãã以ä¸ã«åºãããã¾ããã 15721.courses.cs.cmu.edu è±èªãï¼èªåã«ã¨ã£ã¦ï¼èãåãããããåç»ã®å質ï¼ç»è³ªãã¹ã©ã¤ããã¡ããã¨è¦ãããã©ããã¨ãã£ãé¨åï¼ãè¯ããã®ã§ãã¤èå³ã®ããå 容ã§åºæ¥ãã°ã¹ã©ã¤ããããããã§ã»ã»ã»ã¨ãªãã¨ãªããªãå°ãªãã§ãããããã¯ããªãè¦ãããã§ãã ã¹ã©ã¤ããæ¦å¿µå³ãé »ç¹ã«ç»å ´ããããã¦ãããã ãã§ãèãåããªãã£ãé¨åãªã©ãããªãè£å®ã§ãã¾ãã ã¹ã±ã¸ã¥ã¼ã«ãã¼ã¸
17. åå¤æ -- ãã¼ãã«ã®æ§é `hoge` CREATE TABLE IF NOT EXISTS `hoge` ( `id` int(11) NOT NULL, `val` varchar(255) NOT NULL ); mysql> SELECT * FROM hoge; +----+--------+ | id | val | +----+--------+ | 1 | ONE | | 2 | 2 | | 3 | Three3 | | 4 | 4Four | +----+--------+ 4 rows in set (0,00 sec) 18. åå¤æ mysql> SELECT * FROM hoge WHERE val = "0"; Empty set (0,00 sec) mysql> SELECT * FROM hoge WHERE val = 2; +----+-
ã©ã³ãã³ã°
ã©ã³ãã³ã°
ã©ã³ãã³ã°
ãªãªã¼ã¹ãé害æ å ±ãªã©ã®ãµã¼ãã¹ã®ãç¥ãã
ææ°ã®äººæ°ã¨ã³ããªã¼ã®é ä¿¡
å¦çãå®è¡ä¸ã§ã
j次ã®ããã¯ãã¼ã¯
kåã®ããã¯ãã¼ã¯
lãã¨ã§èªã
eã³ã¡ã³ãä¸è¦§ãéã
oãã¼ã¸ãéã
{{#tags}}- {{label}}
{{/tags}}