{"id":1526,"date":"2024-11-21T20:55:09","date_gmt":"2024-11-21T11:55:09","guid":{"rendered":"https:\/\/rakudaseitai.com\/?p=1526"},"modified":"2024-11-25T20:06:51","modified_gmt":"2024-11-25T11:06:51","slug":"qgis_sql","status":"publish","type":"post","link":"https:\/\/rakudaseitai.com\/?p=1526","title":{"rendered":"QGIS\u3067shp\u30d5\u30a1\u30a4\u30eb\u7b49\u306e\u5c5e\u6027\u30c6\u30fc\u30d6\u30eb\u3092SQL\u3067\u7de8\u96c6\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"

\u624b\u9806<\/p>\n

shp\u30d5\u30a1\u30a4\u30eb\u3092\u8ffd\u52a0\u5f8c\u306b\u3001\u4e0a\u306e\u30e1\u30cb\u30e5\u30fc\u30d0\u30fc\u306e\u30ec\u30a4\u30e4 \u2192 \u30ec\u30a4\u30e4\u3092\u4f5c\u6210 \u2192 \u65b0\u898f\u4eee\u60f3\u30ec\u30a4\u30e4\u2026\u3000\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\u203b\u4eca\u56de\u306f\u3001AED\u8a2d\u7f6e\u4e8b\u696d\u6240_\u5ba4\u862d\u5e02_ \u3068\u3044\u3046\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u306eshp\u30d5\u30a1\u30a4\u30eb\u3092\u5165\u308c\u3066\u304a\u308a\u307e\u3059\u3002<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\u30ec\u30a4\u30e4\u540d\u3092\u5165\u529b\u3057\u3066\u3001\u30af\u30a8\u30ea\u306bSQL\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n

\u4f8b\uff1aSELECT * FROM AED\u8a2d\u7f6e\u4e8b\u696d\u6240_\u5ba4\u862d\u5e02_<\/p>\n

shp\u30d5\u30a1\u30a4\u30eb\u306e\u5168\u5c5e\u6027\u3092\u62bd\u51fa\u3059\u308b\u30af\u30a8\u30ea\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

test\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u30a8\u30e9\u30fc\u304c\u3042\u308b\u304b\u306e\u78ba\u8a8d\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u8ffd\u52a0\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u65b0\u305f\u306a\u30ec\u30a4\u30e4\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\u65b0\u305f\u306b\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u304c\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u306f\u4e00\u6642\u7684\u306a\u30ec\u30a4\u30e4\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u6539\u3081\u3066shp\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u3067\u4fdd\u5b58\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u30ec\u30a4\u30e4\u3092\u53f3\u30af\u30ea\u30c3\u30af \u2192 \u30a8\u30af\u30b9\u30dd\u30fc\u30c8 \u2192 \u65b0\u898f\u30d5\u30a1\u30a4\u30eb\u306b\u5730\u7269\u3092\u4fdd\u5b58\u3000\u304b\u3089\u3001\u65b0\u305f\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p>\n

SELECT *\u3067\u306f\u3001\u3059\u3079\u3066\u306e\u5c5e\u6027\u304c\u62bd\u51fa\u3055\u308c\u307e\u3059\u3002<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\u4ee5\u4e0b\u306b\u7c21\u5358\u306aSQL\u306e\u4f8b\u6587\u306e\u4e00\u89a7\u3092\u8f09\u305b\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n

\u7528\u9014\u306b\u5408\u308f\u305b\u3066\u3054\u4f7f\u7528\u304f\u3060\u3055\u3044\u3002<\/p>\n

\u7b46\u8005\u306f\u3001\u5c5e\u6027\u306e\u30c7\u30fc\u30bf\u91cf\u304c\u591a\u3044\u3068\u304d\u3084\u30d7\u30ed\u30bb\u30b7\u30f3\u30b0\u30c4\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u304c\u3046\u307e\u304f\u52d5\u304b\u306a\u3044\u3068\u304d\u306b\u3001SQL\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30fc\u30bf\u3092\u52a0\u5de5\u3057\u3066\u3044\u307e\u3059\u3002<\/strong><\/p>\n

 <\/p>\n

\u30c7\u30fc\u30bf\u53d6\u5f97<\/strong><\/p>\n

SELECT<\/strong><\/p>\n

\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u57fa\u672c\u69cb\u6587\u3002<\/p>\n

SELECT \u30ab\u30e9\u30e0\u540d FROM \u30c6\u30fc\u30d6\u30eb\u540d;<\/p>\n

\u4f8b:<\/strong>SELECT name, age FROM users WHERE age > 20 ORDER BY age DESC;<\/p>\n

 <\/p>\n

DISTINCT<\/strong><\/p>\n

\u91cd\u8907\u3092\u6392\u9664\u3057\u3066\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3002<\/p>\n

SELECT DISTINCT \u30ab\u30e9\u30e0\u540d FROM \u30c6\u30fc\u30d6\u30eb\u540d;<\/p>\n

 <\/p>\n

WHERE<\/strong><\/p>\n

\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u3066\u30c7\u30fc\u30bf\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3002<\/p>\n

SELECT * FROM \u30c6\u30fc\u30d6\u30eb\u540d WHERE \u6761\u4ef6;<\/p>\n

\u6f14\u7b97\u5b50:<\/strong><\/p>\n

    \n
  1. \n
      \n
    • = \u7b49\u3057\u3044<\/li>\n
    • != \u307e\u305f\u306f <> \u7b49\u3057\u304f\u306a\u3044<\/li>\n
    • > \/ < \u5927\u306a\u308a \/ \u5c0f\u306a\u308a<\/li>\n
    • LIKE \u90e8\u5206\u4e00\u81f4\uff08%\u3084_\u3092\u4f7f\u3046\uff09<\/li>\n
    • IN \u30ea\u30b9\u30c8\u306e\u4e2d\u306b\u542b\u307e\u308c\u308b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

       <\/p>\n

      \u30c7\u30fc\u30bf\u306e\u64cd\u4f5c<\/strong><\/p>\n

      INSERT<\/strong><\/p>\n

      \u30c7\u30fc\u30bf\u3092\u633f\u5165\u3002<\/p>\n

      INSERT INTO \u30c6\u30fc\u30d6\u30eb\u540d (\u30ab\u30e9\u30e01, \u30ab\u30e9\u30e02) VALUES (\u50241, \u50242);<\/p>\n

       <\/p>\n

      UPDATE<\/strong><\/p>\n

      \u30c7\u30fc\u30bf\u3092\u66f4\u65b0\u3002<\/p>\n

      UPDATE \u30c6\u30fc\u30d6\u30eb\u540d SET \u30ab\u30e9\u30e0\u540d = \u65b0\u3057\u3044\u5024 WHERE \u6761\u4ef6;<\/p>\n

       <\/p>\n

      DELETE<\/strong><\/p>\n

      \u30c7\u30fc\u30bf\u3092\u524a\u9664\u3002<\/p>\n

      DELETE FROM \u30c6\u30fc\u30d6\u30eb\u540d WHERE \u6761\u4ef6;<\/p>\n

       <\/p>\n

      \u96c6\u8a08<\/strong><\/p>\n

      GROUP BY<\/strong><\/p>\n

      \u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3002<\/p>\n

      SELECT \u30ab\u30e9\u30e0\u540d, COUNT(*) FROM \u30c6\u30fc\u30d6\u30eb\u540d GROUP BY \u30ab\u30e9\u30e0\u540d;<\/p>\n

       <\/p>\n

      HAVING<\/strong><\/p>\n

      \u30b0\u30eb\u30fc\u30d7\u5316\u3057\u305f\u5f8c\u306e\u6761\u4ef6\u6307\u5b9a\u3002<\/p>\n

      SELECT \u30ab\u30e9\u30e0\u540d, COUNT(*) FROM \u30c6\u30fc\u30d6\u30eb\u540d GROUP BY \u30ab\u30e9\u30e0\u540d HAVING COUNT(*) > 1;<\/p>\n

       <\/p>\n

      ORDER BY<\/strong><\/p>\n

      \u30c7\u30fc\u30bf\u3092\u4e26\u3073\u66ff\u3048\u3002<\/p>\n

      SELECT * FROM \u30c6\u30fc\u30d6\u30eb\u540d ORDER BY \u30ab\u30e9\u30e0\u540d ASC; \u2014 DESC\u3067\u964d\u9806<\/p>\n

       <\/p>\n

      LIMIT<\/strong><\/p>\n

      \u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u6570\u3092\u5236\u9650\u3002<\/p>\n

      SELECT * FROM \u30c6\u30fc\u30d6\u30eb\u540d LIMIT \u6570\u5024 OFFSET \u6570\u5024; \u2014 OFFSET\u3067\u958b\u59cb\u4f4d\u7f6e\u6307\u5b9a<\/p>\n

       <\/p>\n

      \u7d50\u5408<\/strong><\/p>\n

      INNER JOIN<\/strong><\/p>\n

      2\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3002<\/p>\n

      SELECT * FROM \u30c6\u30fc\u30d6\u30ebA<\/p>\n

      INNER JOIN \u30c6\u30fc\u30d6\u30ebB ON \u30c6\u30fc\u30d6\u30ebA.id = \u30c6\u30fc\u30d6\u30ebB.a_id;<\/p>\n

       <\/p>\n

      LEFT JOIN<\/strong> \/ RIGHT JOIN<\/strong><\/p>\n

      \u4e00\u65b9\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5fc5\u305a\u30c7\u30fc\u30bf\u3092\u6b8b\u3059\u7d50\u5408\u3002<\/p>\n

      SELECT * FROM \u30c6\u30fc\u30d6\u30ebA<\/p>\n

      LEFT JOIN \u30c6\u30fc\u30d6\u30ebB ON \u30c6\u30fc\u30d6\u30ebA.id = \u30c6\u30fc\u30d6\u30ebB.a_id;<\/p>\n

       <\/p>\n

      FULL OUTER JOIN<\/strong><\/p>\n

      \u4e21\u65b9\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u5168\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3002<\/p>\n

      SELECT * FROM \u30c6\u30fc\u30d6\u30ebA<\/p>\n

      FULL OUTER JOIN \u30c6\u30fc\u30d6\u30ebB ON \u30c6\u30fc\u30d6\u30ebA.id = \u30c6\u30fc\u30d6\u30ebB.a_id;<\/p>\n

       <\/p>\n

      \u30b5\u30d6\u30af\u30a8\u30ea<\/strong><\/p>\n

      \u30b5\u30d6\u30af\u30a8\u30ea<\/strong><\/p>\n

      \u30af\u30a8\u30ea\u306e\u4e2d\u306b\u30af\u30a8\u30ea\u3092\u8a18\u8ff0\u3002<\/p>\n

      SELECT name FROM users WHERE id IN (SELECT user_id FROM orders WHERE amount > 1000);<\/p>\n

       <\/p>\n

      WITH\u53e5<\/strong>\uff08CTE: \u5171\u901a\u30c6\u30fc\u30d6\u30eb\u5f0f\uff09<\/p>\n

      \u30b5\u30d6\u30af\u30a8\u30ea\u3092\u7c21\u6f54\u306b\u7ba1\u7406\u3002<\/p>\n

      WITH RecentOrders AS (<\/p>\n

      SELECT * FROM orders WHERE order_date > \u20182024-01-01\u2019<\/p>\n

      )<\/p>\n

      SELECT * FROM RecentOrders;<\/p>\n

       <\/p>\n

      \u6761\u4ef6\u5206\u5c90<\/strong><\/p>\n

      CASE\u6587<\/strong><\/p>\n

      \u6761\u4ef6\u306b\u5fdc\u3058\u3066\u5024\u3092\u5909\u3048\u308b\u3002<\/p>\n

      SELECT<\/p>\n

      name,<\/p>\n

      CASE<\/p>\n

      WHEN age < 20 THEN \u2018\u672a\u6210\u5e74\u2019<\/p>\n

      WHEN age BETWEEN 20 AND 65 THEN \u2018\u6210\u4eba\u2019<\/p>\n

      ELSE \u2018\u9ad8\u9f62\u8005\u2019<\/p>\n

      END AS category<\/p>\n

      FROM users;<\/p>\n

       <\/p>\n

      \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c<\/strong><\/p>\n

      CREATE TABLE<\/strong><\/p>\n

      \u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3002<\/p>\n

      CREATE TABLE \u30c6\u30fc\u30d6\u30eb\u540d (<\/p>\n

      id INT PRIMARY KEY,<\/p>\n

      name VARCHAR(100),<\/p>\n

      age INT<\/p>\n

      );<\/p>\n

       <\/p>\n

      ALTER TABLE<\/strong><\/p>\n

      \u30c6\u30fc\u30d6\u30eb\u69cb\u9020\u3092\u5909\u66f4\u3002<\/p>\n

      ALTER TABLE \u30c6\u30fc\u30d6\u30eb\u540d ADD COLUMN address VARCHAR(255);<\/p>\n

       <\/p>\n

      DROP TABLE<\/strong><\/p>\n

      \u30c6\u30fc\u30d6\u30eb\u3092\u524a\u9664\u3002<\/p>\n

      DROP TABLE \u30c6\u30fc\u30d6\u30eb\u540d;<\/p>\n

       <\/p>\n

      \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong><\/p>\n

      \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f5c\u6210<\/strong><\/p>\n

      \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u306e\u305f\u3081\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3002<\/p>\n

      CREATE INDEX idx_name ON \u30c6\u30fc\u30d6\u30eb\u540d(\u30ab\u30e9\u30e0\u540d);<\/p>\n

       <\/p>\n

       <\/p>\n

       <\/p>\n","protected":false},"excerpt":{"rendered":"

      \u624b\u9806 shp\u30d5\u30a1\u30a4\u30eb\u3092\u8ffd\u52a0\u5f8c\u306b\u3001\u4e0a\u306e\u30e1\u30cb\u30e5\u30fc\u30d0\u30fc\u306e\u30ec\u30a4\u30e4 \u2192 \u30ec\u30a4\u30e4\u3092\u4f5c\u6210 \u2192 \u65b0\u898f\u4eee\u60f3\u30ec\u30a4\u30e4\u2026\u3000\u3092\u9078\u629e\u3057\u307e\u3059\u3002   \u203b\u4eca\u56de\u306f\u3001AED\u8a2d\u7f6e\u4e8b\u696d\u6240_\u5ba4\u862d\u5e02_ \u3068\u3044\u3046\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u306eshp\u30d5\u30a1\u30a4\u30eb\u3092\u5165\u308c\u3066\u304a\u308a\u307e\u3059\u3002 … <\/p>\n","protected":false},"author":1,"featured_media":1532,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,29,17],"tags":[],"class_list":{"0":"post-1526","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-gis","8":"category-29","9":"category-17"},"_links":{"self":[{"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=\/wp\/v2\/posts\/1526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1526"}],"version-history":[{"count":2,"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=\/wp\/v2\/posts\/1526\/revisions"}],"predecessor-version":[{"id":1533,"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=\/wp\/v2\/posts\/1526\/revisions\/1533"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=\/wp\/v2\/media\/1532"}],"wp:attachment":[{"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rakudaseitai.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}