select语句实战#129
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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！ |
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May 31, 2020
| import java.sql.Connection; | ||
| import java.sql.DriverManager; | ||
| import java.sql.SQLException; | ||
| import java.sql.*; |
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不应使用 '.*' 形式的导入 - java.sql.* 。
| public static int countUsersWhoHaveBoughtGoods(Connection databaseConnection, Integer goodsId) throws SQLException { | ||
| 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 51e4cf4 ，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 51e4cf4 ，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 95666fd ，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 95666fd ，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 7daf3a4 ，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 7daf3a4 ，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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select语句与JDBC实战