select practice by lionlihuang · Pull Request #140 · hcsp/practise-select-sql

lionlihuang · 2020-06-23T01:39:25Z

这个PR解答了当前仓库中的题目（机器人会自动判题并合并当前PR）
这个PR修复了当前仓库中的一些代码缺陷（机器人不会判题，而是由管理员来处理当前PR）

hcsp-bot · 2020-06-23T01:39:27Z

🎉 感谢提交Pull Request！请稍等片刻，我们已经将其提交到CI进行检查，一旦有结果会立即通知您！

hcsp-bot · 2020-06-23T01:39:27Z

-import java.sql.Connection;
-import java.sql.DriverManager;
-import java.sql.SQLException;
+import java.sql.*;


不应使用 '.*' 形式的导入 - java.sql.* 。

hcsp-bot · 2020-06-23T01:39:27Z

-    public static List<Order> getLeftJoinOrders(Connection databaseConnection) throws SQLException {
-        return null;
+    public static List<GoodsAndGmv> getLeftJoinOrders(Connection databaseConnection) throws SQLException {
+        String sql = "select GOODS_ID, GOODS.NAME, sum(GOODS_NUM * GOODS_PRICE) as GMV\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T01:39:28Z

-        return null;
+    public static List<GoodsAndGmv> getLeftJoinOrders(Connection databaseConnection) throws SQLException {
+        String sql = "select GOODS_ID, GOODS.NAME, sum(GOODS_NUM * GOODS_PRICE) as GMV\n" +
+                "from `ORDER`\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T01:39:28Z

+    public static List<GoodsAndGmv> getLeftJoinOrders(Connection databaseConnection) throws SQLException {
+        String sql = "select GOODS_ID, GOODS.NAME, sum(GOODS_NUM * GOODS_PRICE) as GMV\n" +
+                "from `ORDER`\n" +
+                "         join GOODS ON `ORDER`.GOODS_ID = GOODS.ID\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T01:39:29Z

+        String sql = "select GOODS_ID, GOODS.NAME, sum(GOODS_NUM * GOODS_PRICE) as GMV\n" +
+                "from `ORDER`\n" +
+                "         join GOODS ON `ORDER`.GOODS_ID = GOODS.ID\n" +
+                "group by GOODS_ID\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T01:40:53Z

你的提交 d1c04d6 ，似乎失败了：Your tests failed on CircleCI

😅 请不要气馁，仔细分析原因，再接再厉！

hcsp-bot · 2020-06-23T01:40:54Z

你的提交 d1c04d6 ，似乎失败了：Your tests failed on CircleCI

😅 请不要气馁，仔细分析原因，再接再厉！

hcsp-bot · 2020-06-23T05:41:02Z

你的提交 0192096 ，似乎失败了：Your tests failed on CircleCI

😅 请不要气馁，仔细分析原因，再接再厉！

hcsp-bot · 2020-06-23T05:41:03Z

你的提交 0192096 ，似乎失败了：Your tests failed on CircleCI

😅 请不要气馁，仔细分析原因，再接再厉！

hcsp-bot · 2020-06-23T05:58:28Z

+        public static List<GoodsAndGmv> getGoodsAndGmv (Connection databaseConnection) throws SQLException {
+            List<GoodsAndGmv> gmvList = new ArrayList<>();

+            try (PreparedStatement statement = databaseConnection.prepareStatement("select `order`.goods_id, goods.name, `order`.goods_price * sum(`order`.goods_num) as gmv from `order`\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:29Z

+            List<GoodsAndGmv> gmvList = new ArrayList<>();

+            try (PreparedStatement statement = databaseConnection.prepareStatement("select `order`.goods_id, goods.name, `order`.goods_price * sum(`order`.goods_num) as gmv from `order`\n" +
+                    "join goods\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:29Z


+            try (PreparedStatement statement = databaseConnection.prepareStatement("select `order`.goods_id, goods.name, `order`.goods_price * sum(`order`.goods_num) as gmv from `order`\n" +
+                    "join goods\n" +
+                    "on `order`.goods_id = goods.id\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:30Z

+            try (PreparedStatement statement = databaseConnection.prepareStatement("select `order`.goods_id, goods.name, `order`.goods_price * sum(`order`.goods_num) as gmv from `order`\n" +
+                    "join goods\n" +
+                    "on `order`.goods_id = goods.id\n" +
+                    "group by `order`.goods_id\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:30Z

-     * 题目5：
-     * 查询所有订单信息，哪怕它的用户名、商品名缺失，即LEFT JOIN方式
-     */
+            try (PreparedStatement statement = databaseConnection.prepareStatement("select `order`.id as order_id, user.name as user_name, goods.name as goods_name, `order`.goods_price * sum(`order`.goods_num) as total_price from `order`\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:34Z

+                        "\t\tuser.name AS USER_NAME, \n" +
+                        "\t\tgoods.name AS GOODS_NAME, \n" +
+                        "\t\t`order`.goods_price * sum(`order`.goods_num) AS total_price \n" +
+                        "from `order`\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:35Z

+                        "\t\tgoods.name AS GOODS_NAME, \n" +
+                        "\t\t`order`.goods_price * sum(`order`.goods_num) AS total_price \n" +
+                        "from `order`\n" +
+                        "\tleft join goods\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:35Z

+                        "\t\t`order`.goods_price * sum(`order`.goods_num) AS total_price \n" +
+                        "from `order`\n" +
+                        "\tleft join goods\n" +
+                        "\t\ton `order`.goods_id = goods.id\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:36Z

+                        "from `order`\n" +
+                        "\tleft join goods\n" +
+                        "\t\ton `order`.goods_id = goods.id\n" +
+                        "\tleft join user\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:36Z

+                        "\tleft join goods\n" +
+                        "\t\ton `order`.goods_id = goods.id\n" +
+                        "\tleft join user\n" +
+                        "\t\ton `order`.user_id = user.id\n" +


'+' 应另起一行。

hcsp-bot · 2020-06-23T05:58:44Z

你的提交 8228336 ，似乎失败了：Your tests failed on CircleCI

😅 请不要气馁，仔细分析原因，再接再厉！

hcsp-bot · 2020-06-23T05:58:45Z

你的提交 8228336 ，似乎失败了：Your tests failed on CircleCI

😅 请不要气馁，仔细分析原因，再接再厉！

hcsp-bot · 2020-06-23T08:53:11Z

+                        "\tleft join user\n" +
+                        "\t\ton `order`.user_id = user.id\n" +
+                        "group by `order`.id")) {
+                    ResultSet resultSet = statement.executeQuery();


你看这个方法是不是和getInnerJoinOrders有大量的代码重复？考虑过抽取一个公用方法出来么？

hcsp-bot · 2020-06-23T11:34:03Z

你的提交 c3168b8 ，似乎失败了：Your tests failed on CircleCI

😅 请不要气馁，仔细分析原因，再接再厉！

hcsp-bot · 2020-06-23T11:34:03Z

你的提交 c3168b8 ，似乎失败了：Your tests failed on CircleCI

😅 请不要气馁，仔细分析原因，再接再厉！

select practice

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SELECT #141

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lionlihuang added 2 commits June 23, 2020 14:37

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