{"id":4376,"date":"2021-10-10T01:40:22","date_gmt":"2021-10-09T16:40:22","guid":{"rendered":"https:\/\/suzutukiblog.com\/?p=4376"},"modified":"2022-10-08T00:30:27","modified_gmt":"2022-10-07T15:30:27","slug":"mysql13","status":"publish","type":"post","link":"https:\/\/suzutukiblog.com\/index.php\/2021\/10\/10\/mysql13\/","title":{"rendered":"MySQL(\u305d\u306e13\u5916\u90e8\u7d50\u5408(outer join),union,union all)"},"content":{"rendered":"

\u305d\u306e12\u304b\u3089\u7d9a\u304d\u307e\u3059\u3002<\/a><\/p>\n

\u5916\u90e8\u7d50\u5408\u3068\u306f\uff1f<\/h3>\n

\u7247\u65b9\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u60c5\u5831\u304c\u3059\u3079\u3066\u51fa\u529b\u3055\u308c\u308b\u30c6\u30fc\u30d6\u30eb\u306e\u7d50\u5408<\/p>\n

\u5916\u90e8\u7d50\u5408\u306f\u6b20\u843d\u306e\u3042\u308b\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u6271\u3046\u7d50\u5408<\/p>\n

\u69cb\u6587\uff1a\u5916\u90e8\u7d50\u5408 left outer join<\/h3>\n

select \u30c6\u30fc\u30d6\u30eb\u540d1.\u5217\u540d,\u30c6\u30fc\u30d6\u30eb\u540d2.\u5217\u540d\u30fb\u30fb\u30fb
\nfrom
\n\u30c6\u30fc\u30d6\u30eb\u540d1
\nleft outer join
\n\u30c6\u30fc\u30d6\u30eb\u540d2
\non \u30c6\u30fc\u30d6\u30eb\u540d1.\u5217\u540d = \u30c6\u30fc\u30d6\u30eb\u540d2.\u5217\u540d\uff1b<\/p>\n

left outer join \/ right\u00a0outer join<\/h3>\n

left outer join\u30fb\u30fb\u30fb\u5de6\u5074(from\u53e5\u3067\u6700\u521d\u306b\u66f8\u3044\u305f\u30c6\u30fc\u30d6\u30eb)\u3092\u30de\u30b9\u30bf\u30fc\u3068\u3059\u308b\u3002<\/p>\n

right outer join\u30fb\u30fb\u30fb\u53f3\u5074(from\u53e5\u3067\u5f8c\u306b\u66f8\u3044\u305f\u30c6\u30fc\u30d6\u30eb)\u3092\u30de\u30b9\u30bf\u30fc\u3068\u3059\u308b\u3002<\/p>\n

select\r\nu.last_name,\r\nu.id,\r\no.user_id,\r\no.id\r\nfrom\r\nusers u\r\nleft outer join\r\norders as o\r\non u.id = o.user_id\r\norder by u.id;<\/strong><\/pre>\n
\"\"<\/p>\n
\u203b\u30dd\u30a4\u30f3\u30c8<\/h3>\n
<\/p>\n
outer\u306f\u7701\u7565\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3002inner\u3068\u306e\u9055\u3044\u306fuser_id\u3084order_id\u306bnull\u304c\u7701\u7565\u3055\u308c\u305a\u3001\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u3068\u3053\u308d\u3002<\/p>\n
\u5fdc\u7528)\u5168\u3066\u306e\u5546\u54c1\u306b\u3064\u3044\u3066\u8ca9\u58f2\u500b\u6570\u4e00\u89a7\u3092\u51fa\u3057\u305f\u3044\uff01ER\u56f3<\/a>\u3092\u53c2\u8003\u306b<\/h3>\n
select\r\n  p.id,\r\n  p.name,\r\n  sum(od.product_qty)num\r\nfrom products as p\r\nleft outer join\r\n  order_details as od\r\non p.id = od.product_id\r\ngroup by p.id;<\/strong><\/pre>\n
\"\"<\/p>\n
3\u3064\u4ee5\u4e0a\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u3063\u305f\u7d50\u5408<\/h3>\n
\u4f8b\uff1a\u6ce8\u6587\u4e00\u89a7\u3092\u51fa\u3057\u305f\u3044\u3002\u6ce8\u6587\u8a73\u7d30\u60c5\u5831\u3068\u5546\u54c1\u60c5\u5831\u3082\u4e00\u89a7\u306e\u4e2d\u306b\u5165\u308c\u305f\u3044\uff01ER\u56f3<\/a>\u3092\u53c2\u8003\u306b\u3057\u3066\u89e3\u3053\u3046<\/h3>\n
select\r\n  o.id,\r\n  o.user_id,\r\n  o.amount,\r\n  o.order_time,\r\n  p.name,\r\n  od.product_id,\r\n  od.product_qty,\r\n  od.product_price\r\nfrom orders as o\r\ninner join\r\n  order_details as od\r\non o.user_id = od.order_id\r\ninner join\r\n  products as p\r\non od.order_id = p.id<\/strong><\/pre>\n
\"\"<\/p>\n
\u203b\u30dd\u30a4\u30f3\u30c8<\/h3>\n
join\u306f\u8907\u6570\u56de\u4f7f\u3048\u308b<\/p>\n
\u5fdc\u75282)user_id \u3060\u3068\u8ab0\u306a\u306e\u304b\u308f\u304b\u3089\u306a\u3044\u306e\u3067,\u540d\u5b57\u3068\u540d\u524d\u3092\u4e00\u89a7\u306b\u8ffd\u52a0\u3057\u305f\u3044\uff01<\/h3>\n
select\r\n  o.id,\r\n  o.user_id,\r\n  o.amount,\r\n  o.order_time,\r\n  u.last_name,\r\n  u.first_name,\r\n  p.name,\r\n  od.product_id,\r\n  od.product_qty,\r\n  od.product_price\r\nfrom orders as o\r\ninner join\r\n  order_details as od\r\n  on o.user_id = od.order_id\r\ninner join\r\n  products as p\r\n  on od.order_id = p.id\r\ninner join\r\n  users as u\r\non o.user_id = u.id;<\/strong><\/pre>\n
\"\"<\/p>\n
\u203b\u30dd\u30a4\u30f3\u30c8<\/h3>\n
\u8868\u306f3\u3064\u4ee5\u4e0a\u7d50\u5408\u3067\u304d\u308b<\/p>\n
\u591a\u5bfe\u591a\u306e\u95a2\u4fc2\u3092\u542b\u3080\u7d50\u5408<\/h3>\n
\u4f8b\uff1a\u5546\u54c1id\u304c3\u306b\u7d10\u4ed8\u304f\u5546\u54c1\u30ab\u30c6\u30b4\u30ea\u540d\u3092\u5168\u3066\u77e5\u308a\u305f\u3044\uff01
\n\u5fc5\u8981\u306a\u60c5\u5831\u306f\u5546\u54c1id,\u5546\u54c1\u540d,\u30ab\u30c6\u30b4\u30ea\u540d,ER\u56f3<\/a>\u3092\u53c2\u8003\u306b<\/h3>\n
select\r\n  p.name,\r\n  p.id,\r\n  c.name\r\nfrom products as p\r\ninner join\r\nproducts_categories as pc\r\n  on p.id = pc.product_id\r\ninner join\r\n  categories as c\r\n  on pc.category_id = c.id\r\n  where p.id = 3;<\/strong><\/pre>\n
\"\"<\/p>\n
\u30c6\u30fc\u30d6\u30eb\u306e\u8db3\u3057\u7b97(union,union all)<\/h3>\n
\u69cb\u6587<\/p>\n
select \u52171,\u30fb\u30fb\u30fb from \u30c6\u30fc\u30d6\u30eb1
\nunion select \u52172,\u30fb\u30fb\u30fbFROM \u30c6\u30fc\u30d6\u30eb2<\/p>\n
\u203b\u6ce8\u610f\u70b9<\/h3>\n
\u30c6\u30fc\u30d6\u30eb1\u3068\u30c6\u30fc\u30d6\u30eb2\u3067\u5217\u6570\u3092\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n
\u540c\u3058\u4f4d\u7f6e\u306b\u3042\u308b\u30ab\u30e9\u30e0\u306e\u30c7\u30fc\u30bf\u578b\u306f\u4e00\u81f4\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n
\u4f8b)users\u30c6\u30fc\u30d6\u30eb \/ admin_users\u30c6\u30fc\u30d6\u30eb<\/p>\n
\u30fbemail\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 – email<\/p>\n
\u30fblast_name\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 – last_name<\/p>\n
\u30fbfirst_name\u00a0 \u00a0 \u00a0 \u00a0 \u00a0– first_name<\/p>\n
\u30fbgender\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0– gender<\/p>\n
\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u3068\u30a2\u30c9\u30df\u30f3\u30e6\u30fc\u30b6\u30fc\u3092\u8db3\u3057\u5408\u308f\u305b\u305f\u4e00\u89a7\u304c\u6b32\u3057\u3044\uff01
\n\u51fa\u529b\u3057\u305f\u3044\u5217\u306f e-mail\u3001\u59d3\u3001\u540d\u3001\u6027\u5225 \u6027\u5225\u3092\u8868\u3059\u6570\u5b57 1,2\u3067 ok<\/h3>\n
select\r\n  email,\r\n  last_name,\r\n  first_name,\r\n  gender\r\nfrom users\r\nunion\r\nselect\r\nemail,\r\nlast_name,\r\nfirst_name,\r\ngender\r\nfrom\r\nadmin_users;<\/strong><\/pre>\n
\"\"<\/p>\n
\u5fdc\u7528)users \u30c6\u30fc\u30d6\u30eb\u304b\u3089\u7537\u6027\u3060\u3051,
\nadmin_users\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u306f\u5973\u6027\u3060\u3051\u629c\u51fa\u3057
\nunion \u3057\u305f\u7d50\u679c\u3092\u6027\u5225\u3060\u3051\u306b\u4e26\u3073\u66ff\u3048\u308b<\/h3>\n
select\r\n  email,last_name,first_name,\r\n  gender\r\nfrom users\r\nwhere gender = 1\r\nunion\r\nselect\r\nemail, last_name, first_name, gender\r\nfrom\r\n admin_users\r\n where gender =2\r\norder by gender;<\/strong><\/pre>\n
\"\"<\/p>\n
\u2191order by\u306f\u6700\u5f8c(\u5168\u4f53\u306b\u4e00\u3064)\u306b\u3057\u304b\u3064\u3051\u308c\u306a\u3044\u306e\u3067\u6ce8\u610f!<\/strong><\/p>\n
union all\u306f\u91cd\u8907\u3057\u305f\u3082\u306e\u3092\u51fa\u529b\u3057\u305f\u3044\u3068\u304d\u306b\u4f7f\u3046<\/strong><\/p>\n
\u305d\u306e14\u306b\u7d9a\u304d\u307e\u3059\u3002<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u305d\u306e12\u304b\u3089\u7d9a\u304d\u307e\u3059\u3002 \u5916\u90e8\u7d50\u5408\u3068\u306f\uff1f \u7247\u65b9\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u60c5\u5831\u304c\u3059\u3079\u3066\u51fa\u529b\u3055\u308c\u308b\u30c6\u30fc\u30d6\u30eb\u306e\u7d50\u5408 \u5916\u90e8\u7d50\u5408\u306f\u6b20\u843d\u306e\u3042\u308b\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u6271\u3046\u7d50\u5408 \u69cb\u6587\uff1a\u5916\u90e8\u7d50\u5408 left outer join select \u30c6\u30fc\u30d6\u30eb\u540d1.\u5217\u540d,\u30c6 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[5,27],"tags":[],"class_list":["post-4376","post","type-post","status-publish","format-standard","hentry","category-mysql","category-programming-note"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/4376","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/comments?post=4376"}],"version-history":[{"count":8,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/4376\/revisions"}],"predecessor-version":[{"id":6028,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/4376\/revisions\/6028"}],"wp:attachment":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/media?parent=4376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/categories?post=4376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/tags?post=4376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}