{"id":1283,"date":"2025-03-11T14:45:48","date_gmt":"2025-03-11T05:45:48","guid":{"rendered":"https:\/\/route-zero.com\/recruit\/route\/1283\/"},"modified":"2025-06-11T14:55:32","modified_gmt":"2025-06-11T05:55:32","slug":"1283","status":"publish","type":"route","link":"https:\/\/route-zero.com\/recruit\/route\/1283\/","title":{"rendered":"SQL Syntax Error\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff5c\u4eca\u3059\u3050\u8a66\u305b\u308b\u30a8\u30e9\u30fc\u89e3\u6c7a\u6cd5"},"content":{"rendered":"<div>\n<h2>\u3042\u306a\u305f\u3082\u3053\u3093\u306a\u7d4c\u9a13\u3042\u308a\u307e\u305b\u3093\u304b\uff1f<\/h2>\n<p>\u300cSQL\u6587\u3092\u5b9f\u884c\u3057\u305f\u3089 syntax error \u3068\u3060\u3051\u8868\u793a\u3055\u308c\u3066\u5148\u306b\u9032\u3081\u306a\u3044\u300d<br \/>\u300c\u3069\u3053\u304c\u9593\u9055\u3063\u3066\u3044\u308b\u306e\u304b\u3001\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u4e0d\u89aa\u5207\u3067\u56f0\u308b\u300d<br \/>\u300c\u540c\u50da\u306e\u30b3\u30fc\u30c9\u3092\u30b3\u30d4\u30da\u3057\u305f\u3060\u3051\u306a\u306e\u306b\u52d5\u304b\u306a\u3044\u2026\u300d<\/p>\n<p>SQL\u69cb\u6587\u30a8\u30e9\u30fc\uff08syntax error\uff09\u306f\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u306a\u3089\u8ab0\u3067\u3082\u4e00\u5ea6\u306f\u906d\u9047\u3059\u308b\u5384\u4ecb\u306a\u554f\u984c\u3067\u3059\u3002\u3057\u304b\u3082\u305d\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u4e00\u898b\u3057\u3066\u4f55\u306e\u30d2\u30f3\u30c8\u306b\u3082\u306a\u3089\u306a\u3044\u3053\u3068\u304c\u591a\u304f\u3001\u7279\u306b\u521d\u5fc3\u8005\u306b\u3068\u3063\u3066\u306f\u5927\u304d\u306a\u58c1\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001SQL\u69cb\u6587\u30a8\u30e9\u30fc\u306e\u300c\u3088\u304f\u3042\u308b\u539f\u56e0\u300d\u3068\u300c\u5177\u4f53\u7684\u306a\u89e3\u6c7a\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u300d\u3092\u4f53\u7cfb\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<br \/>\u300c\u3069\u3053\u3092\u76f4\u305b\u3070\u3044\u3044\u304b\u3059\u3050\u5206\u304b\u308b\u300d\u3053\u3068\u3092\u76ee\u7684\u306b\u69cb\u6210\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u5b9f\u52d9\u4e2d\u306e\u30a8\u30e9\u30fc\u8abf\u67fb\u306b\u3082\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<hr>\n<h2>\u306a\u305cSQL Syntax Error\u304c\u767a\u751f\u3059\u308b\u306e\u304b\uff1f<\/h2>\n<p>\u69cb\u6587\u30a8\u30e9\u30fc\u3068\u306f\u3001SQL\u6587\u306e<strong>\u6587\u6cd5\u30eb\u30fc\u30eb<\/strong>\u306b\u9055\u53cd\u3057\u3066\u3044\u308b\u72b6\u614b\u3067\u3059\u3002<br \/>\u4ee5\u4e0b\u306f\u69cb\u6587\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u5178\u578b\u7684\u306a\u539f\u56e0\u3067\u3059\uff1a<\/p>\n<ul>\n<li>\n<p>\u6587\u6cd5\u306b\u5408\u3063\u3066\u3044\u306a\u3044\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u4f7f\u7528<\/p>\n<\/li>\n<li>\n<p>\u30af\u30a9\u30fc\u30c8\u6f0f\u308c\u3001\u30ab\u30f3\u30de\u6f0f\u308c<\/p>\n<\/li>\n<li>\n<p>\u30c7\u30fc\u30bf\u578b\u306e\u4e0d\u4e00\u81f4\u3084\u30b5\u30dd\u30fc\u30c8\u5916\u306e\u95a2\u6570\u4f7f\u7528<\/p>\n<\/li>\n<li>\n<p>\u30c6\u30fc\u30d6\u30eb\u540d\u30fb\u30ab\u30e9\u30e0\u540d\u306e\u8aa4\u8a18<\/p>\n<\/li>\n<li>\n<p>SQL\u65b9\u8a00\uff08MySQL\u30fbPostgreSQL\u306a\u3069\uff09\u306e\u9055\u3044\u3092\u7121\u8996\u3057\u305f\u66f8\u304d\u65b9<\/p>\n<\/li>\n<\/ul>\n<h3>\u4f8b\uff1a\u57fa\u672c\u7684\u306a\u69cb\u6587\u30a8\u30e9\u30fc<\/h3>\n<pre><code>SELECT name age FROM users;\r\n-- \u300c,\u300d\u304c\u629c\u3051\u3066\u3044\u308b\u305f\u3081\u69cb\u6587\u30a8\u30e9\u30fc<\/code><\/pre>\n<p>\u4fee\u6b63\u5f8c\uff1a<\/p>\n<pre><code>SELECT name, age FROM users;<\/code><\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<strong>\u305f\u3063\u305f\u4e00\u6587\u5b57\u306e\u30df\u30b9\u304c\u30a8\u30e9\u30fc\u306b\u3064\u306a\u304c\u308b<\/strong>\u306e\u304cSQL\u306e\u96e3\u3057\u3055\u3067\u3059\u3002<\/p>\n<hr>\n<h2>\u4eca\u3059\u3050\u78ba\u8a8d\u3057\u305f\u3044\uff01\u69cb\u6587\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\n<p>\u4ee5\u4e0b\u306b\u3001<strong>\u5b9f\u52d9\u3067\u3088\u304f\u3042\u308b\u69cb\u6587\u30a8\u30e9\u30fc\u306e\u767a\u751f\u539f\u56e0\u3068\u305d\u306e\u78ba\u8a8d\u30dd\u30a4\u30f3\u30c8<\/strong>\u3092\u30ea\u30b9\u30c8\u30a2\u30c3\u30d7\u3057\u307e\u3059\u3002<\/p>\n<h3>1. SELECT\u6587\u306b\u30ab\u30f3\u30de\u3092\u5165\u308c\u5fd8\u308c\u3066\u3044\u306a\u3044\u304b\uff1f<\/h3>\n<p>NG\u4f8b\uff1a<\/p>\n<pre><code>SELECT id name FROM employees;<\/code><\/pre>\n<p>\u2192 \u4fee\u6b63\uff1a<\/p>\n<pre><code>SELECT id, name FROM employees;<\/code><\/pre>\n<h3>2. \u30af\u30a9\u30fc\u30c8\u306e\u9589\u3058\u5fd8\u308c\u306f\u306a\u3044\u304b\uff1f<\/h3>\n<p>NG\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE name = <span>'Taro<\/span>;<\/code><\/pre>\n<p>\u2192 \u4fee\u6b63\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE name = <span>'Taro'<\/span>;<\/code><\/pre>\n<p>\u203b\u7279\u306b&#8217;\u3084&#8221;\u306e\u30da\u30a2\u30df\u30b9\u306f\u76ee\u8996\u3057\u3065\u3089\u3044\u306e\u3067\u6ce8\u610f\u3002<\/p>\n<h3>3. \u4e88\u7d04\u8a9e\u3092\u30ab\u30e9\u30e0\u540d\u30fb\u30c6\u30fc\u30d6\u30eb\u540d\u306b\u4f7f\u3063\u3066\u3044\u306a\u3044\u304b\uff1f<\/h3>\n<p>NG\u4f8b\uff1a<\/p>\n<h3>3. \u4e88\u7d04\u8a9e\u3092\u30ab\u30e9\u30e0\u540d\u30fb\u30c6\u30fc\u30d6\u30eb\u540d\u306b\u4f7f\u3063\u3066\u3044\u306a\u3044\u304b\uff1f<\/h3>\n<p>NG\u4f8b\uff1a<\/p>\n<pre><code>SELECT order, price FROM sales;<\/code><\/pre>\n<p>\u2192 \u4fee\u6b63\uff1a<\/p>\n<pre><code>SELECT <span>`order`<\/span>, price FROM sales;<\/code><\/pre>\n<p>\u203border\u306fSQL\u306e\u4e88\u7d04\u8a9e\u306e\u305f\u3081\u3001\u30d0\u30c3\u30af\u30af\u30a9\u30fc\u30c8\u3067\u56f2\u3080\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>4. WHERE\u53e5\u3084JOIN\u53e5\u306e\u6761\u4ef6\u304c\u66d6\u6627\u3067\u306a\u3044\u304b\uff1f<\/h3>\n<p>NG\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM orders JOIN customers;<\/code><\/pre>\n<p>\u2192 \u4fee\u6b63\uff1a<\/p>\n<pre><code>SELECT * FROM orders JOIN customers ON orders.customer_id = customers.id;<\/code><\/pre>\n<p>\u6761\u4ef6\u304c\u306a\u3044JOIN\u306f\u69cb\u6587\u7684\u306b\u3082\u610f\u5473\u7684\u306b\u3082\u30a8\u30e9\u30fc\u306e\u5143\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<hr>\n<h2>\u3010\u3064\u307e\u305a\u304d\u30dd\u30a4\u30f3\u30c8\u5225\u3011\u69cb\u6587\u30a8\u30e9\u30fc\u306e\u5bfe\u51e6\u6cd5<\/h2>\n<h3>\u306a\u305c\u578b\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u306e\uff1f<\/h3>\n<p>\u578b\u306e\u4e0d\u4e00\u81f4\u3082\u9593\u63a5\u7684\u306b\u69cb\u6587\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002<\/p>\n<p>NG\u4f8b\uff08PostgreSQL\uff09\uff1a<\/p>\n<pre><code>SELECT * FROM logs WHERE user_id = <span>'123'<\/span>;\r\n-- user_id\u304cINTEGER\u578b\u306a\u306e\u306b\u6587\u5b57\u5217\u3067\u6bd4\u8f03<\/code><\/pre>\n<p>\u2192 \u4fee\u6b63\uff1a<\/p>\n<pre><code>SELECT * FROM logs WHERE user_id = 123;<\/code><\/pre>\n<h3>\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u30ab\u30c3\u30b3\u3092\u9589\u3058\u5fd8\u308c\u3066\u3044\u306a\u3044\u304b\uff1f<\/h3>\n<p>NG\u4f8b\uff1a<\/p>\n<pre><code>SELECT name FROM users WHERE id IN (SELECT user_id FROM logs;<\/code><\/pre>\n<p>\u2192 \u4fee\u6b63\uff1a<\/p>\n<pre><code><span>SELECT name FROM users WHERE id <span>IN<\/span> <span>(SELECT user_id FROM logs)<\/span><\/span>;<\/code><\/pre>\n<h3>\u30a8\u30e9\u30fc\u306e\u884c\u756a\u53f7\u306f\u300c\u305d\u306e\u524d\u306e\u884c\u300d\u304c\u602a\u3057\u3044<\/h3>\n<pre><code>1: SELECT id, name\r\n2: FROM users\r\n3: WHERE age &gt; 20\r\n4: ORDER BY name\r\n5: LIMIT 10;\r\n6: \u2190\u3053\u3053\u3067\u69cb\u6587\u30a8\u30e9\u30fc\r\n\r\n\u2192 \u5b9f\u969b\u306f3\u884c\u76ee\u306e\u672b\u5c3e\u306b\u300c;\u300d\u304c\u5fc5\u8981\u3060\u3063\u305f<\/code><\/pre>\n<p>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u884c\u6570\u306b\u60d1\u308f\u3055\u308c\u305a\u3001\u300c\u76f4\u524d\u306e\u884c\u300d\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<hr>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n<h3>Q1. \u69cb\u6587\u30a8\u30e9\u30fc\u3092\u81ea\u52d5\u3067\u691c\u51fa\u3067\u304d\u308b\u30c4\u30fc\u30eb\u306f\u3042\u308b\uff1f<\/h3>\n<p>\u2192 \u591a\u304f\u306eDB\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\uff08DBeaver, DataGrip\u306a\u3069\uff09\u3084\u30a8\u30c7\u30a3\u30bf\uff08VS Code\u306eSQL\u62e1\u5f35\uff09\u3067\u306f<strong>\u69cb\u6587\u30c1\u30a7\u30c3\u30af\u6a5f\u80fd<\/strong>\u304c\u3042\u308a\u307e\u3059\u3002\u65e9\u671f\u306b\u6c17\u3065\u304f\u305f\u3081\u306b\u5229\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>Q2. \u30a8\u30e9\u30fc\u304c\u51fa\u306a\u3044\u306e\u306b\u671f\u5f85\u3057\u305f\u7d50\u679c\u304c\u8fd4\u3089\u306a\u3044\u2026<\/h3>\n<p>\u2192 <strong>\u69cb\u6587\u30a8\u30e9\u30fc\u3067\u306f\u306a\u304f\u30ed\u30b8\u30c3\u30af\u30a8\u30e9\u30fc<\/strong>\u306e\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff08\u4f8b\uff1aJOIN\u6761\u4ef6\u306e\u30df\u30b9\uff09\u3002EXPLAIN\u306a\u3069\u3092\u4f7f\u3063\u3066\u5b9f\u884c\u8a08\u753b\u3092\u78ba\u8a8d\u3059\u308b\u3068\u539f\u56e0\u304c\u898b\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<hr>\n<h2>\u307e\u3068\u3081\uff5c\u69cb\u6587\u30a8\u30e9\u30fc\u306f\u300c\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u578b\u300d\u3067\u5bfe\u51e6\u305b\u3088<\/h2>\n<ul>\n<li>\n<p>SQL\u69cb\u6587\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306f<strong>\u5c0f\u3055\u306a\u8a18\u8ff0\u30df\u30b9<\/strong>\u304c\u307b\u3068\u3093\u3069<\/p>\n<\/li>\n<li>\n<p>\u51b7\u9759\u306b\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3067\u539f\u56e0\u3092\u6f70\u3057\u3066\u3044\u3051\u3070\u5fc5\u305a\u76f4\u308b<\/p>\n<\/li>\n<li>\n<p>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3042\u304f\u307e\u3067\u300c\u30d2\u30f3\u30c8\u300d\u7a0b\u5ea6\u306b\u6d3b\u7528\u3057\u3088\u3046<\/p>\n<\/li>\n<\/ul>\n<hr>\n<h3>\u3010\u5916\u90e8\u30ea\u30f3\u30af\u3011<\/h3>\n<p><a href=\"https:\/\/dev.mysql.com\/doc\/\" target=\"_blank\" rel=\"noopener noreferrer\">MySQL\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a><\/p>\n<p><a href=\"https:\/\/www.postgresql.org\/docs\/\" target=\"_blank\" rel=\"noopener noreferrer\">PostgreSQL\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a><\/p>\n<p><a href=\"https:\/\/www.sqlite.org\/lang.html\" target=\"_blank\" rel=\"noopener noreferrer\">SQLite\u8a00\u8a9e\u4ed5\u69d8<\/a><\/p>\n<p><a href=\"https:\/\/www.w3schools.com\/sql\/sql_syntax.asp\" target=\"_blank\" rel=\"noopener noreferrer\">W3Schools: SQL Syntax<\/a><\/p>\n<p><a href=\"https:\/\/learn.microsoft.com\/en-us\/sql\/t-sql\/statements\/select-transact-sql\" target=\"_blank\" rel=\"noopener noreferrer\">Microsoft Learn: SELECT (Transact-SQL)<\/a><\/p>\n<p><a href=\"https:\/\/www.sqltutorial.org\/sql-select\/\" target=\"_blank\" rel=\"noopener noreferrer\">SQL Tutorial: SELECT\u6587\u306e\u4f7f\u3044\u65b9<\/a><\/p>\n<p><a href=\"https:\/\/www.ibm.com\/docs\/en\/db2\/11.5?topic=reference-sql-errors\" target=\"_blank\" rel=\"noopener noreferrer\">IBM DB2 SQL\u30a8\u30e9\u30fc\u4e00\u89a7<\/a><\/p>\n<h3>\u3010\u5185\u90e8\u30ea\u30f3\u30af\u3011<\/h3>\n<p><a href=\"https:\/\/route-zero.com\/recruit\/route\/1233\/\">\u521d\u5fc3\u8005\u5411\u3051SQL\u8b1b\u5ea7\uff5cSELECT\u6587\u306e\u66f8\u304d\u65b9\u3068\u5b9f\u884c\u9806\u3092\u5b8c\u5168\u89e3\u8aac<\/a><\/p>\n<p><a href=\"https:\/\/route-zero.com\/recruit\/route\/1119\/\">SQL JOIN\u306e\u57fa\u672c\u304b\u3089\u5b9f\u8df5\u307e\u3067\uff5cINNER\u30fbLEFT\u30fbRIGHT\u30fbOUTER JOIN\u306e\u9055\u3044\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/a><\/p>\n<p><a href=\"https:\/\/route-zero.com\/recruit\/route\/1241\/\">SQL UNION\u306e\u4f7f\u3044\u65b9\u3092\u3084\u3055\u3057\u304f\u89e3\u8aac\uff5c\u9055\u3044\u30fb\u6ce8\u610f\u70b9\u30fb\u6d3b\u7528\u4f8b\u307e\u3068\u3081<\/a><\/p>\n<p><a href=\"https:\/\/route-zero.com\/recruit\/route\/1237\/\">MySQL\u306eROW_NUMBER()\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u6700\u65b0\u30c7\u30fc\u30bf\u30921\u4ef6\u3060\u3051\u62bd\u51fa\u3059\u308b\u65b9\u6cd5<\/a><\/p>\n<p><a href=\"https:\/\/route-zero.com\/recruit\/route\/912\/\">\u3010Docker\u5165\u9580\u3011MySQL\u74b0\u5883\u3092\u624b\u8efd\u306b\u69cb\u7bc9\u3059\u308b\u65b9\u6cd5\u3092\u5fb9\u5e95\u89e3\u8aac<\/a><\/p>\n<\/div>\n","protected":false},"featured_media":1284,"template":"","_links":{"self":[{"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/route\/1283"}],"collection":[{"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/route"}],"about":[{"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/types\/route"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/media\/1284"}],"wp:attachment":[{"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/media?parent=1283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}