数据库实战: SELECT命令与JDBC使用#135
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Jackwu1
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Jun 8, 2020
Jackwu1
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- 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）
Contributor
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🎉 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
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Jun 8, 2020
| import java.sql.Connection; | ||
| import java.sql.DriverManager; | ||
| import java.sql.SQLException; | ||
| import java.sql.*; |
Contributor
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不应使用 '.*' 形式的导入 - java.sql.* 。
| return 0; | ||
| // return 0; | ||
| String sql = "select count(distinct user_id) from \"ORDER\" where goods_id = ? ;"; | ||
| try(PreparedStatement preparedStatement = databaseConnection.prepareStatement(sql)) { |
| public static List<GoodsAndGmv> getGoodsAndGmv(Connection databaseConnection) throws SQLException { | ||
| return null; | ||
| List<GoodsAndGmv> goodsAndGmvList = new ArrayList<>(); | ||
| try (PreparedStatement statement = databaseConnection.prepareStatement("select GOODS_ID, GOODS.NAME, sum(GOODS_NUM * GOODS_PRICE) as total\n" + |
| return null; | ||
| List<GoodsAndGmv> goodsAndGmvList = new ArrayList<>(); | ||
| try (PreparedStatement statement = databaseConnection.prepareStatement("select GOODS_ID, GOODS.NAME, sum(GOODS_NUM * GOODS_PRICE) as total\n" + | ||
| "from `ORDER`\n" + |
| List<GoodsAndGmv> goodsAndGmvList = new ArrayList<>(); | ||
| try (PreparedStatement statement = databaseConnection.prepareStatement("select GOODS_ID, GOODS.NAME, sum(GOODS_NUM * GOODS_PRICE) as total\n" + | ||
| "from `ORDER`\n" + | ||
| " join GOODS on `ORDER`.GOODS_ID = GOODS.ID\n" + |
| return null; | ||
| List<Order> orderList = new ArrayList<>(); | ||
| try (PreparedStatement statement = databaseConnection.prepareStatement("select \"ORDER\".ID, U.NAME, G.NAME, GOODS_NUM * GOODS_PRICE\n" + | ||
| "from `ORDER`\n" + |
| List<Order> orderList = new ArrayList<>(); | ||
| try (PreparedStatement statement = databaseConnection.prepareStatement("select \"ORDER\".ID, U.NAME, G.NAME, GOODS_NUM * GOODS_PRICE\n" + | ||
| "from `ORDER`\n" + | ||
| " join USER U on `ORDER`.USER_ID = U.ID\n" + |
| public static List<Order> getLeftJoinOrders(Connection databaseConnection) throws SQLException { | ||
| return null; | ||
| List<Order> orderList = new ArrayList<>(); | ||
| try (PreparedStatement statement = databaseConnection.prepareStatement("select \"ORDER\".ID, U.NAME, G.NAME, GOODS_NUM * GOODS_PRICE\n" + |
| return null; | ||
| List<Order> orderList = new ArrayList<>(); | ||
| try (PreparedStatement statement = databaseConnection.prepareStatement("select \"ORDER\".ID, U.NAME, G.NAME, GOODS_NUM * GOODS_PRICE\n" + | ||
| "from `ORDER`\n" + |
| List<Order> orderList = new ArrayList<>(); | ||
| try (PreparedStatement statement = databaseConnection.prepareStatement("select \"ORDER\".ID, U.NAME, G.NAME, GOODS_NUM * GOODS_PRICE\n" + | ||
| "from `ORDER`\n" + | ||
| " left join USER U on `ORDER`.USER_ID = U.ID\n" + |
Contributor
|
你的提交 72fa0de ，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！ |
1 similar comment
Contributor
|
你的提交 72fa0de ，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！ |
Contributor
|
你的提交 29fd745 ，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！ |
1 similar comment
Contributor
|
你的提交 29fd745 ，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！ |
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