{"id":378,"date":"2024-12-01T10:43:36","date_gmt":"2024-12-01T01:43:36","guid":{"rendered":"https:\/\/se-pg-toolbox.com\/?p=378"},"modified":"2024-12-01T10:43:37","modified_gmt":"2024-12-01T01:43:37","slug":"%e3%80%90sql%e5%85%a5%e9%96%80%e3%80%91sql%e3%81%ae%e3%82%af%e3%82%a8%e3%83%aa%e3%81%ae%e5%9f%ba%e6%9c%ac%e3%82%92%e8%a7%a3%e8%aa%ac%e3%80%82inner-join%ef%bc%88%e5%86%85%e9%83%a8%e7%b5%90%e5%90%88","status":"publish","type":"post","link":"https:\/\/se-pg-toolbox.com\/?p=378","title":{"rendered":"\u3010SQL\u5165\u9580\u3011SQL\u306e\u30af\u30a8\u30ea\u306e\u57fa\u672c\u3092\u89e3\u8aac\u3002INNER JOIN\uff08\u5185\u90e8\u7d50\u5408\uff09\u3068LEFT JOIN\uff08\u5de6\u5916\u90e8\u7d50\u5408\uff09\u306e\u9055\u3044"},"content":{"rendered":"\n

\u4eca\u56de\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30af\u30a8\u30ea\u306eINNER JOIN\u3068LEFT JOIN\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002

\u3069\u3061\u3089\u3082\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\u3082\u306e\u3067\u3059\u304c\u3001INNER JOIN\u306f\u5185\u90e8\u7d50\u5408\u3001LEFT JOIN\u306f\u5916\u90e8\u7d50\u5408\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3067\u3059\u3002

\u5185\u90e8\u7d50\u5408\u3068\u5916\u90e8\u7d50\u5408\u306f\u7570\u306a\u308b\u3082\u306e\u3067\u3001\u9055\u3044\u3092\u3088\u304f\u899a\u3048\u3066\u304a\u304b\u306a\u3044\u3068\u6b63\u3057\u3044\u30af\u30a8\u30ea\u306f\u66f8\u3051\u307e\u305b\u3093\u3002

\u4eca\u56de\u304a\u8a71\u3057\u3059\u308b\u5185\u5bb9\u306f\u5b9f\u52d9\u3067\u3082\u3088\u304f\u4f7f\u3046\u3082\u306e\u306a\u306e\u3067\u3001\u304d\u3061\u3093\u30682\u3064\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u3066\u6b32\u3057\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

INNER JOIN\uff08\u5185\u90e8\u7d50\u5408\uff09\u306e\u6319\u52d5<\/h2>\n\n\n\n

\u307e\u305a\u3001INNER JOIN\u306e\u8aac\u660e\u3092\u3059\u308b\u524d\u306b\u4eca\u56de\u4f7f\u7528\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002

\u4eca\u56de\u4f7f\u7528\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u306f\u300citem\u300d\u3068\u3044\u3046\u5546\u54c1\u30de\u30b9\u30bf\u306e\u30c6\u30fc\u30d6\u30eb\u3068\u3001\u300csales\u300d\u3068\u3044\u3046\u58f2\u308a\u4e0a\u3052\u60c5\u5831\u3092\u767b\u9332\u3059\u308b\u30c8\u30e9\u30f3\u306e\u30c6\u30fc\u30d6\u30eb\u306e\uff12\u3064\u3067\u3059\u3002

item\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u4e2d\u8eab\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u305d\u3057\u3066\u3001sales\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u4e2d\u8eab\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306bINNER JOIN\u3092\u4f7f\u3063\u305f\u30af\u30a8\u30ea\u3092\u8a18\u8ff0\u3057\u3066\u3001\u58f2\u308a\u4e0a\u3052\u60c5\u5831\u3092\u53d6\u308a\u51fa\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n

SELECT sales.date, item.item_code, sales.seq_no, item.price * sales.amount as sales_price\nFROM sales\nINNER JOIN item \nON item.item_code = sales.item_code<\/code><\/pre><\/div>\n\n\n\n
\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\u5834\u5408\u3001ON\u53e5\u306b\u7d50\u5408\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002

\u3053\u3053\u3067\u306f\u5546\u54c1\u30b3\u30fc\u30c9\u3092\u7d50\u5408\u3057\u305f\u3044\u305f\u3081\u305d\u308c\u305e\u308c\u306e\u30c6\u30fc\u30d6\u30eb\u306eitem_code\u3092\u7d50\u5408\u6761\u4ef6\u306b\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002

\u306a\u304a\u3001\u7d50\u5408\u6761\u4ef6\u306fAND\u3084OR\u3092\u4f7f\u3063\u3066\u8907\u6570\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u51fa\u6765\u307e\u3059\u3002

\u3067\u306f\u3001\u3053\u306e\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u7d50\u679c\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
sales\u30c6\u30fc\u30d6\u30eb\u306e\u3046\u3061\u3001item\u30c6\u30fc\u30d6\u30eb\u306b\u5b58\u5728\u3059\u308b\u5546\u54c1\u30b3\u30fc\u30c9\u306e\u60c5\u5831\u306e\u307f\u3092\u304d\u3061\u3093\u3068\u62bd\u51fa\u3067\u304d\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002

sales\u30c6\u30fc\u30d6\u30eb\u306e\u4e00\u756a\u4e0b\u306b\u3042\u3063\u305fitem_code\u304c10005\u306e\u30c7\u30fc\u30bf\u306fitem\u30c6\u30fc\u30d6\u30eb\u306b\u8a72\u5f53\u3059\u308b\u30b3\u30fc\u30c9\u304c\u306a\u3044\u305f\u3081\u3001INNER JOIN\u3092\u884c\u3063\u305f\u7d50\u679c\u306b\u306f\u51fa\u3066\u304d\u3066\u3044\u307e\u305b\u3093\u3002

INNER JOIN\u306b\u3088\u308b\u5185\u90e8\u7d50\u5408\u306f\u7d50\u5408\u6761\u4ef6\u306b\u6307\u5b9a\u3057\u305f\u5217\u304c\u3001\u53cc\u65b9\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5b58\u5728\u3059\u308b\u5024\u306e\u3082\u306e\u306e\u307f\u3092\u53d6\u5f97\u3059\u308b\u3068\u899a\u3048\u3066\u304a\u304f\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002

\u7d50\u5408\u7d50\u679c\u304cNULL\u306b\u306a\u308b\u3082\u306e\u306fINNER JOIN\u306b\u3088\u308b\u5185\u90e8\u7d50\u5408\u3067\u306f\u9664\u5916\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
LEFT JOIN\uff08\u5de6\u5916\u90e8\u7d50\u5408\uff09\u306e\u6319\u52d5<\/h2>\n\n\n\n
\u3067\u306f\u3001LEFT JOIN\u306b\u3088\u308b\u5916\u90e8\u7d50\u5408\u306e\u52d5\u4f5c\u3092\u898b\u3066\u307f\u307e\u3059\u3002

LEFT JOIN\u306fLEFT OUTER JOIN\u3068\u66f8\u304f\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u304c\u3001OUTER\u306f\u7701\u7565\u3055\u308c\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002

\u307e\u305f\u3001RIGHT JOIN\u3068\u3044\u3046\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u3042\u307e\u308a\u4f7f\u3046\u3053\u3068\u304c\u306a\u3044\u305f\u3081\u3001LEFT JOIN\u306e\u307f\u3092\u8aac\u660e\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002

LEFT JOIN\u3092\u4f7f\u3063\u305f\u30af\u30a8\u30ea\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n\n
SELECT sales.date, item.item_code, sales.seq_no, item.price * sales.amount as sales_price\nFROM sales\nLEFT JOIN item \nON item.item_code = sales.item_code<\/code><\/pre><\/div>\n\n\n\n
INNER JOIN\u306e\u8aac\u660e\u306e\u969b\u306b\u4f7f\u3063\u305f\u30af\u30a8\u30ea\u3092INNER JOIN\u304b\u3089LEFT JOIN\u306b\u7f6e\u304d\u63db\u3048\u305f\u3060\u3051\u3067\u3059\u304c\u3001sales\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5de6\u304b\u3089item\u30c6\u30fc\u30d6\u30eb\u3092\u5916\u90e8\u7d50\u5408\u3059\u308b\u52d5\u4f5c\u306b\u306a\u308a\u307e\u3059\u3002

LEFT JOIN\u3092\u4f7f\u3063\u305f\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u5916\u90e8\u7d50\u5408\u306f\u3001sales\u30c6\u30fc\u30d6\u30eb\u306b\u5b58\u5728\u3057\u3066\u3082item\u30c6\u30fc\u30d6\u30eb\u306b\u5b58\u5728\u3057\u306a\u3044\u3068\u3044\u3046\u5834\u5408\u3067\u3082\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u7d50\u5408\u7d50\u679c\u306b\u542b\u307f\u307e\u3059\u3002

\u305d\u306e\u305f\u3081\u3001sales\u30c6\u30fc\u30d6\u30eb\u306b\u5b58\u5728\u3057\u3066\u3044\u3066item\u30c6\u30fc\u30d6\u30eb\u306b\u5b58\u5728\u3057\u306a\u3044item_code\u304c10005\u306e\u30c7\u30fc\u30bf\u3082\u7d50\u679c\u3068\u3057\u3066\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002

\u3053\u306e\u6319\u52d5\u306f\u6c17\u3092\u4ed8\u3051\u308b\u3079\u304d\u3067\u3042\u308a\u3001NULL\u306e\u30c7\u30fc\u30bf\u3092\u542b\u3081\u308b\u304b\u3069\u3046\u304b\u3067INNER JOIN\u3092\u4f7f\u3046\u304bLEFT JOIN\u3092\u4f7f\u3046\u304b\u3092\u3046\u307e\u304f\u4f7f\u3044\u5206\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002

LEFT JOIN\u306b\u3088\u308aNULL\u306b\u306a\u3063\u3066\u3082\u3059\u3079\u3066\u306e\u884c\u3092\u53d6\u5f97\u3057\u305f\u3044\u3068\u3053\u308d\u3092INNER JOIN\u3092\u4f7f\u3046\u3068\u3001\u8a72\u5f53\u3059\u308b\u884c\u304c\u53d6\u5f97\u3067\u304d\u305a\u3001\u4e0d\u90fd\u5408\u306b\u306a\u3063\u3066\u3057\u307e\u3063\u305f\u308a\u3001NULL\u306e\u884c\u304c\u5fc5\u8981\u306a\u3044\u306e\u306bLEFT JOIN\u3092\u4f7f\u3046\u3068\u3001\u4e0d\u8981\u306a\u884c\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u3001\u4e0d\u90fd\u5408\u306a\u3053\u3068\u306b\u306a\u3063\u305f\u308a\u3057\u307e\u3059\u3002

\u30b7\u30f3\u30d7\u30eb\u306a\u30af\u30a8\u30ea\u3067\u3042\u308c\u3070\u305d\u3053\u307e\u3067\u554f\u984c\u306b\u306a\u3089\u306a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3044\u304f\u3064\u3082\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\u8907\u96d1\u306a\u30af\u30a8\u30ea\u306b\u306a\u308b\u3068\u3001\u3069\u306e\u3088\u3046\u306a\u52d5\u4f5c\u306b\u306a\u308b\u306e\u304b\u3001INNER JOIN\u3068LEFT JOIN\u306e\u9055\u3044\u304c\u5206\u304b\u3089\u306a\u3044\u3068\u30af\u30a8\u30ea\u306e\u5185\u5bb9\u3092\u7406\u89e3\u3059\u308b\u306e\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002
<\/p>\n\n\n\n
\u307e\u3068\u3081<\/h2>\n\n\n\n
\u4eca\u56de\u306f\u4ee5\u4e0b\u306e\u5185\u5bb9\u3092\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
    \n
  1. INNER JOIN\u306e\u5185\u90e8\u7d50\u5408\u306f\u4e21\u65b9\u306e\u30b3\u30fc\u30c9\u304c\u4e00\u81f4\u3059\u308b\u3082\u306e\u3060\u3051\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u3001\u7d50\u5408\u7d50\u679c\u306bNULL\u306e\u884c\u304c\u51fa\u6765\u308b\u3053\u3068\u304c\u306a\u3044<\/li>\n\n\n\n
  2. LEFT JOIN\u306b\u3088\u308b\u5916\u90e8\u7d50\u5408\u306f\u3001\u7d50\u5408\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u306b\u5024\u304c\u306a\u3044\u3082\u306e\u3082\u53d6\u5f97\u3059\u308b\u305f\u3081\u3001\u7d50\u5408\u7d50\u679c\u306bNULL\u304c\u542b\u307e\u308c\u308b\u3082\u306e\u304c\u51fa\u3066\u304f\u308b\u3002<\/li>\n\n\n\n
  3. INNER JOIN\u306b\u3088\u308b\u5185\u90e8\u7d50\u5408\u3068LEFT JOIN\u306b\u3088\u308b\u5916\u90e8\u7d50\u5408\u306f\u7528\u9014\u306b\u3088\u3063\u3066\u3057\u3063\u304b\u308a\u3068\u4f7f\u3044\u5206\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u304d\u3061\u3093\u3068\u4e21\u65b9\u306e\u52d5\u4f5c\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/li>\n<\/ol>\n\n\n\n
    INNER JOIN\u3068LEFT JOIN\u3092\u3046\u307e\u304f\u4f7f\u3044\u5206\u3051\u306a\u3044\u3068\u3001\u30c6\u30fc\u30d6\u30eb\u7d50\u5408\u3092\u884c\u3046\u30af\u30a8\u30ea\u3092\u6b63\u3057\u304f\u66f8\u304f\u3053\u3068\u304c\u51fa\u6765\u307e\u305b\u3093\u3002

    \u305d\u306e\u305f\u3081\u3001\u4e21\u65b9\u306e\u9055\u3044\u306f\u304d\u3061\u3093\u3068\u7406\u89e3\u3057\u3066\u3001\u5b9f\u52d9\u306e\u5834\u3067\u3082\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3088\u3046\u306b\u304d\u3061\u3093\u3068\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002

    \u76f2\u76ee\u7684\u306bLEFT JOIN\u3092\u4f7f\u3063\u3066\u3044\u308b\u30af\u30a8\u30ea\u3092\u3088\u304f\u898b\u304b\u3051\u307e\u3059\u304c\u3001INNER JOIN\u3067\u554f\u984c\u306a\u3051\u308c\u3070INNER JOIN\u3092\u4f7f\u3063\u305f\u65b9\u304c\u3001\u7406\u89e3\u3057\u3084\u3059\u3044\u30af\u30a8\u30ea\u306b\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002


    \u6700\u5f8c\u306b\u3001\u554f\u984c\u3092\u4e00\u3064\u51fa\u984c\u3057\u3066\u3053\u306e\u8a18\u4e8b\u3092\u7de0\u3081\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002

    \u3053\u306e\u554f\u984c\u306b\u89e3\u7b54\u3067\u304d\u308c\u3070\u3001\u4eca\u56de\u8aac\u660e\u3057\u305f\u5185\u5bb9\u304c\u304d\u3061\u3093\u3068\u7406\u89e3\u3067\u304d\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
    \u554f\u984c<\/h4>\n\n\n\n
    LEFT JOIN\u306b\u3088\u308b\u5916\u90e8\u7d50\u5408\u306e\u3068\u3053\u308d\u3067\u51fa\u3066\u304d\u305f\u30af\u30a8\u30ea\u306b\u3001WHERE\u6587\u30921\u3064\u66f8\u304d\u8db3\u3059\u3068INNER JOIN\u306b\u3088\u308b\u5185\u90e8\u7d50\u5408\u3068\u540c\u3058\u6319\u52d5\u306b\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002
    \u4e00\u4f53\u3069\u306e\u3088\u3046\u306aWHERE\u6587\u3092\u66f8\u3051\u3070\u3044\u3044\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n
    \u4eca\u56de\u306e\u8a18\u4e8b\u306f\u3053\u3053\u307e\u3067\u3068\u306a\u308a\u307e\u3059\u3002
    \u307e\u305f\u6b21\u306e\u8a18\u4e8b\u3067\u304a\u4f1a\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
    \u4eca\u56de\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30af\u30a8\u30ea\u306eINNER JOIN\u3068LEFT JOIN\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002 \u3069\u3061\u3089\u3082\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\u3082\u306e\u3067\u3059\u304c\u3001INNER JOIN\u306f\u5185\u90e8\u7d50\u5408\u3001LEFT JOIN\u306f\u5916\u90e8\u7d50\u5408\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3067\u3059\u3002 \u5185\u90e8\u7d50\u5408\u3068<\/p>\n","protected":false},"author":2,"featured_media":359,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jin_ogp_image_url":"","_jin_last_featured_id":0,"footnotes":""},"categories":[23],"tags":[24],"class_list":["post-378","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database","tag-24"],"_links":{"self":[{"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=\/wp\/v2\/posts\/378","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=378"}],"version-history":[{"count":2,"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=\/wp\/v2\/posts\/378\/revisions"}],"predecessor-version":[{"id":384,"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=\/wp\/v2\/posts\/378\/revisions\/384"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=\/wp\/v2\/media\/359"}],"wp:attachment":[{"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/se-pg-toolbox.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}