[B! SQL] vivit_jcã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

vivit_jc id:vivit_jc

SQLã«é–¢ã™ã‚‹vivit_jcã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (8)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

O/Rãƒžãƒƒãƒ‘ãƒ¼ã«ã‚ˆã‚‹ãƒˆãƒ©ãƒ–ãƒ«ã‚’æœªç„¶ã«é˜²ã
2. copyright Â© 2014 kuwata-lab.com all rights reserved ã¾ãˆãŒã ç¾åœ¨ã€ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³é–‹ç™ºã®ç¾å ´ã§ã¯ O/R Mapper (ORM) ãŒæ™®åŠã—ã¦ã„ã¾ã™ã€‚ä»Šå¾Œ ã‚‚ ORM ã‚’ä½¿ã£ãŸé–‹ç™ºã¯ã€å¢—ãˆã‚‹ã“ã¨ã¯ã‚ã£ã¦ã‚‚æ¸›ã‚‹ã“ã¨ã¯ãªã„ã§ã—ã‚‡ã†ã€‚ ã—ã‹ã— ORM ã¯ã€ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³é–‹ç™ºè€…ã«ã¨ã£ã¦ã¯ä¾¿åˆ©ã§ã‚‚ã€DB ç®¡ç†è€… (DBA) ã‹ ã‚‰ã¿ãŸã‚‰ãƒˆãƒ©ãƒ–ãƒ«ã®ç¨®ã§ã‚‚ã‚ã‚Šã¾ã™ã€‚ãã‚ŒãŒç‰¹ã«ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã«é–¢ã™ã‚‹å•é¡Œã§ã‚ã‚‹ã“ ã¨ãŒå¤šã„ãŸã‚ã€é–‹ç™ºè€…ã¨ DBA ãŒå¯¾ç«‹ã™ã‚‹ã“ã¨ã‚‚çã—ãã‚ã‚Šã¾ã›ã‚“ã€‚ ã¨ã¯ã„ãˆã€ORM ã«ã‚ˆã‚‹å•é¡Œã¯ã™ã§ã«è§£æ±ºç–ãŒç”¨æ„ã•ã‚Œã¦ã„ã‚‹å ´åˆãŒã‚ã‚Šã¾ã™ã€‚æœ¬å½“ã® å•é¡Œã¯ã€ã™ã§ã«å˜åœ¨ã™ã‚‹è§£æ±ºç–ãŒã‚ã¾ã‚ŠçŸ¥ã‚‰ã‚Œã¦ã„ãªã„ã“ã¨ã§ã¯ãªã„ã§ã—ã‚‡ã†ã‹ã€‚ ãã“ã§æœ¬ç™ºè¡¨ã§ã¯ã€ORM ã«ã‚ˆã£ã¦ã©ã®ã‚ˆã†ãªå•é¡ŒãŒèµ·ã“ã‚Šã‚„ã™ã„ã‹ã€ã©ã†è§£æ±ºãƒ»äºˆé˜² ã™ã‚Œã°ã„ã„ã‹ã€ãã—ã¦ ORM
vivit_jc 2014/12/22
ORMã¯å‹é”ã€æ€–ããªã„ã‚ˆ

sql
ãƒªãƒ³ã‚¯
SQLä¸Šç´šè€…ã“ãçŸ¥ã£ã¦æ¬²ã—ã„ã€ãªãœO/Rãƒžãƒƒãƒ‘ãƒ¼ãŒé‡è¦ã‹ï¼Ÿ
(PgDay2012ç™ºè¡¨è³‡æ–™) SQLã«ã¨ã£ã¦ã€ãªãœO/Rãƒžãƒƒãƒ‘ãƒ¼ãŒé‡è¦ã‹ã‚’èª¬æ˜Žã—ãŸè³‡æ–™ã§ã™ã€‚Read less
vivit_jc 2014/01/15
rails

SQL

ORãƒžãƒƒãƒ‘ãƒ¼
ãƒªãƒ³ã‚¯
ã‚¨ãƒã‚²ãƒ¼ãƒžãƒ¼ã®ãŸã‚ã®SQL -ã‚¨ãƒã‚²ãƒ¼ãƒžãƒ¼ã®ãŸã‚ã®SQL-
SQLã¯ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‹ã‚‰ãƒ‡ãƒ¼ã‚¿ã‚’æŠ½å‡ºã—ãŸã‚Šã™ã‚‹ãŸã‚ã®è¨€èªžã§ã™ã€‚ ã“ã®æ–‡æ›¸ã¯ã€ErogameScapeã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‹ã‚‰SELECTã‚’ä½¿ã£ã¦è‡ªç”±è‡ªåœ¨ã«ãƒ‡ãƒ¼ã‚¿ã‚’å–å¾—ã§ãã‚‹ã‚ˆã†ã«ãªã‚‹ã“ã¨ã‚’ç›®æ¨™ã«ã—ã¾ã™ã€‚ ã‚¨ãƒã‚²ãƒ¼ã‚’ã‚„ã‚Šã¯ã˜ã‚ã‚‹å¤§å¦ç”Ÿãã‚‰ã„ã®ã¨ãã«ã€å¤§å¦ã®è¬›ç¾©ã§ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚’å¦ã‚“ã§ã€é€€å±ˆã ãªãƒ¼ã¨æ€ã£ãŸæ™‚ã«ã€ErogameScapeã§SQLã‚’å¦ã¶ã“ã¨ã§ã€å°‘ã—ã§ã‚‚SQLã«èˆˆå‘³ã‚’æŒã£ã¦ã€è‡ªèº«ã§ãƒ‡ãƒ¼ã‚¿ã‚’åŠ å·¥ã™ã‚‹ã“ã¨ã‚’å¦ç¿’ã—ã¦é ‚ã‘ã‚‹ã¨å¹¸ã„ã§ã™ã€‚ â€»ç§ã®å¤§å¦ã®ãƒªãƒ¬ãƒ¼ã‚·ãƒ§ãƒŠãƒ«ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®æŽˆæ¥ã§ã¯ã€è‡ªåˆ†ã®èº«ã®å›žã‚Šã®ä½•ã‹ã‚’ERå›³ã«è½ã¨ã—è¾¼ã‚“ã§ã€DBã‚’è¨è¨ˆã—ã€PostgreSQLã«å®Ÿè£…ã—ã€å®Ÿéš›ã«ãƒ‡ãƒ¼ã‚¿ã‚’å…¥åŠ›ã—ã¦SELECTã—ã¦ã¿ã‚‹ã¨ã“ã‚ã¾ã§ã‚’ã‚„ã‚Šã¾ã—ãŸã€‚ ERå›³ã¨ã„ã†æ¦‚å¿µã‚’å¦ã‚“ã ã¨ãã€Œã‚ã‚ã€ã“ã‚Œã¯é¢ç™½ã„ã€ã¨æ€ã„ã¾ã—ãŸã€‚ å…ˆç”Ÿã¯ã“ã†è¨€ã£ãŸã®ã§ã™ã€‚ ã€ŒERå›³ã«è½ã¨ã—è¾¼ã‚€ã¨ã€æ€ã„ã‚‚ã‚ˆã‚‰ãªã‹ã£ãŸã“ã¨ãŒåˆ†ã‹ã‚‹ã€‚ã€ã¨ã€‚ å½“æ™‚ã€
vivit_jc 2014/01/03
ã“ã†ã„ã†ã¨ã“ã‚ãŒå…¥å£ã«ãªã‚‹ã®ç´ æ™´ã‚‰ã—ã„

SQL

ã‚¨ãƒã‚²

ãƒã‚¿
ãƒªãƒ³ã‚¯
ã‹ã¤ã¦ã€ç§ã®éš£ã«SQLã®é”å¥³ãŒã„ãŸ
ä»Šæ—¥ãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆã®æ‰“ã¡ä¸Šã’ãŒã‚ã£ãŸã®ã ãŒã€ã¨ã‚ã‚‹ã‚µãƒ—ãƒ©ã‚¤ã‚ºâ€¦â€¦ä¸‰ãƒ¶æœˆå‰ã«å¯¿é€€ç¤¾ã—ãŸå…ˆè¼©ã¨ã®å†ä¼šã«æ€ã‚ãšæ¶™ãã‚“ã§ã—ã¾ã„ã€ã²ã©ãã°ã¤ãŒæ‚ªã„æ€ã„ã‚’ã—ã¦ã„ã‚‹ã€‚ä»Šã‚‚é¡”ã®ç«ç…§ã‚ŠãŒæŠœã‘ã¦ãã‚Œãªã„ã€‚ã‚¢ãƒ«ã‚³ãƒ¼ãƒ«ã¯æŠœã‘ãŸã®ã«ã€‚å½¼å¥³ã¯ã‹ã¤ã¦SQLã®é”å¥³ã¨å‘¼ã°ã‚Œã¦ã„ãŸã€‚ ä»Šã‹ã‚‰é¡ã‚‹ã“ã¨ä¸€å¹´å‰ã€ç§ã¯è¾žä»¤ã‚’è²°ã„ã€äºŒå¹´ç›®ã«ã—ã¦äº‹æ¥éƒ¨ã”ã¨å¤‰ã‚ã‚‹ã¨ã„ã†æ³¢ä¹±ã‚’ã‚ˆã†ã‚„ãä¹—ã‚Šåˆ‡ã£ã¦ã€æ¥å‹™ç³»ã®SEã®ä»•äº‹å†…å®¹ã€ç‰¹ã«Webã®ã‚¢ãƒ—ãƒªãƒ¬ã‚¤ãƒ¤ãƒ¼ã«ã¤ã„ã¦OJTå½¢å¼ã§å¦ã‚“ã§ã„ãŸã€‚ãã“ã§å…ˆç”Ÿã«ã‚ãŸã‚‹æ–¹ã¨ã—ã¦ä»˜ã„ãŸã®ãŒã€ã¡ã‚‡ã†ã©æ‰‹å¾…ã¡ã ã£ãŸå…ˆè¼©ã§ã‚ã‚‹ã€‚åˆã‚ã¦ãŠä¼šã„ã—ãŸæ™‚ã®å…ˆè¼©ã«å¯¾ã—ã€ç§ã¯æ£ç›´ã¡ã‚‡ã£ã¨ç‰©è¶³ã‚Šãªãæ„Ÿã˜ã¦ã„ãŸã€‚ åˆæ—¥ã«è¡Œã£ãŸPCã®ã‚»ãƒƒãƒ†ã‚£ãƒ³ã‚°ã§ã¯ã€ã“ã‚Œã‚„ã£ã¦ã¨å…ˆè¼©ã‹ã‚‰è³‡æ–™ã‚’æ¸¡ã•ã‚ŒãŸã®ã ãŒã€å¤–éƒ¨ã«ãƒãƒƒãƒˆãŒç¹‹ãŒã‚‰ãªã„ã€‚å…ˆè¼©ã«ç›¸è«‡ã—ã¦å¼„ã£ã¦ã‚‚ã‚‰ã£ãŸã®ã ã‘ã©ç¹‹ãŒã‚‰ãšã€ä»Šæ—¥ã¯ç¤¾å†…ãƒãƒƒãƒˆã§æˆ‘æ…¢ã—ã¦ã€ã¨è¨€ã‚ã‚Œã¦ã‹ã‚‰äºŒæ—¥å¾Œã€è³‡æ–™ãŒå¤ã‹ã£ãŸã“ã¨ãŒåˆ¤æ˜Žã€‚ ä¸Ž
vivit_jc 2013/05/19
SQL

é–‹ç™º

èªã¿ç‰©

ï½²ï½²ï¾Šï¾…ï½¼ï¾€ï¾žï¾…ï½°
ãƒªãƒ³ã‚¯
æ¾³é—¨å…åˆå®˜ç½‘-æ¾³é—¨å…åˆå®˜æ–¹å®˜ç½‘
æ¾³é—¨å…åˆå®˜ç½‘ã€å®˜æ–¹ç›´è¥-ä¿¡èª‰å“ç‰Œã€‘æ¾³é—¨å…åˆå®˜ç½‘å®žåŠ›æ‰“é€ å…¨ç½‘é¡¶çº§ä¿¡èª‰ã€é«˜èµ”çŽ‡ã€æœ€ç¨³å®šçš„å¨±ä¹æœåŠ¡å¹³å°ï¼Œ24å°æ—¶å®¢æœåœ¨çº¿ï¼Œé¦–å……å°±é€ï¼ŒæçŽ°ç§’åˆ°è´¦ï¼Œæ¾³é—¨å…åˆå®˜ç½‘æ¬¢è¿Žæ‚¨çš„åŠ å…¥...
vivit_jc 2013/05/17
rails

sql
ãƒªãƒ³ã‚¯
SQLã‚¢ãƒ³ãƒãƒ‘ã‚¿ãƒ¼ãƒ³ - é–‹ç™ºè€…ã‚’å¾…ã¡å—ã‘ã‚‹25ã®è½ã¨ã—ç©´
3. è«¸å›ã¯è‡ªã‚‰ã®çµŒé¨“ã‹ã‚‰ã„ãã‚‰ã‹å¦ã¶ã“ã¨ãŒã§ ãã‚‹ã¨ã„ã†ã€å…¨ãæ„šã‹ãªè€ƒãˆã§ã‚ã‚ã†ãŒã€ ä½™ã¯ã‚€ã—ã‚ä»–äººã®å¤±æ•—ã‚’å¦ã¶ã“ã¨ã§ã€è‡ªåˆ†ã® å¤±æ•—ã‚’å›žé¿ã™ã‚‹ã“ã¨ã‚’å¥½ã‚€ã€‚ â”€ã‚ªãƒƒãƒˆãƒ¼ãƒ»ãƒ•ã‚©ãƒ³ãƒ»ãƒ“ã‚¹ãƒžãƒ«ã‚¯ Nur ein Idiot glaubt, aus den eigenen Erfahrungen zu lernen. Ich ziehe es vor, aus den Erfahrungen anderer zu lernen, um von vorneherein eigene Fehler zu vermeiden.
vivit_jc 2013/04/27
SQL

ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹
ãƒªãƒ³ã‚¯
http://rick-brain.sblo.jp/article/36959335.html
vivit_jc 2013/01/22
ã“ã‚ŒSQLiteã ã¨ä½¿ãˆãªã„ã‚“ã ãª

rails

sql
ãƒªãƒ³ã‚¯
SQL -TECHSCORE-
ã“ã“ã§ã¯ã€ãƒªãƒ¬ãƒ¼ã‚·ãƒ§ãƒŠãƒ«åž‹ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚’æ“ä½œã™ã‚‹ãŸã‚ã«å¿…é ˆã¨ãªã‚‹ä¸–ç•Œæ¨™æº–è¨€èªž SQL ã«ã¤ã„ã¦ã€åŸºç¤Žã‹ã‚‰å¿œç”¨ã¾ã§è©³ã—ãèª¬æ˜Žã—ã¦ã„ã¾ã™ã€‚ ã¾ãŸã€SQL ã®ã¿ã«ã¨ã©ã¾ã‚‰ãšã€ãƒªãƒ¬ãƒ¼ã‚·ãƒ§ãƒŠãƒ«ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ãƒžãƒãƒ¼ã‚¸ãƒ¡ãƒ³ãƒˆã‚·ã‚¹ãƒ†ãƒ (RDBMS) ã®æŒã¤æ§˜ã€…ãªæ©Ÿèƒ½ã«ã¤ã„ã¦è©³ã—ãèª¬æ˜Žã—ã¦ã„ã¾ã™ã€‚ æœ€å¾Œã«ã¯ã€ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®è¨è¨ˆã«é–¢ã™ã‚‹éžå¸¸ã«é‡è¦ãªè€ƒãˆæ–¹ã«ã¤ã„ã¦ã‚‚è§¦ã‚Œã¦ã„ã¾ã™ã®ã§ã€ã“ã‚Œã‚‰ã‚’å…¨ã¦å¦ç¿’ã™ã‚‹ã¨ã€ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®æ“ä½œã‹ã‚‰è¨è¨ˆã¾ã§å¹…åºƒã„çŸ¥è˜ã‚’èº«ã«ã¤ã‘ã‚‹ã“ã¨ãŒã§ãã‚‹ã§ã—ã‚‡ã†ã€‚ SQL INDEX 1. ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®æ¦‚è¦ 1.1. ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã¨ã¯ 1.2. ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚·ã‚¹ãƒ†ãƒ ã®ç‰¹å¾´ 1.3. ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã¨ãƒ•ã‚¡ã‚¤ãƒ«ã®é•ã„ 1.4. ä»£è¡¨çš„ãªãƒ‡ãƒ¼ã‚¿ãƒ¢ãƒ‡ãƒ« 1.5. ãƒªãƒ¬ãƒ¼ã‚·ãƒ§ãƒŠãƒ«åž‹ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ 1.6. ã¾ã¨ã‚ 2. SQL 2.1. SQL ã®æ´å² 2.2. SQL ã¨ã¯ 2.3. SQL ã®æ©Ÿèƒ½ 2.
vivit_jc 2011/12/09
SQL

å…¥é–€
ãƒªãƒ³ã‚¯
1