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                ### 使用Query 通常業務代碼需要根據一定邏輯查詢數據庫,可以使用Query構造較為復雜的單表條件而避免寫SQL ```java Query<UserEntity> query = sqlManager.query(UserEntity.class); List<UserEntity> entities = query.andEq("department_id",1) .andIsNotNull("name").select(); ``` 日志輸出如下 ``` ┏━━━━━ Debug [sql.SELECT * FROM PUBLIC.SYS_USER WHERE department...] ━━━ ┣ SQL: SELECT * FROM PUBLIC.SYS_USER WHERE department_id = ? AND name IS NOT NULL ┣ 參數: [1] ┣ 位置: org.beetl.sql.test.S1QuickStart.query(S1QuickStart.java:131) ┣ 時間: 7ms ┣ 結果: [8] ┗━━━━━ Debug [sql.SELECT * FROM PUBLIC.SYS_USER WHERE department...] ━━━ ``` 使用LambdaQuery,能很好的支持數據庫重構 ```java LambdaQuery<UserEntity> query = sqlManager.lambdaQuery(UserEntity.class); List<UserEntity> entities = query.andEq(UserEntity::getDepartmentId,1) .andIsNotNull(UserEntity::getName).select(); ``` 這段查詢同上段代碼是一樣的,不同的是使用lambda表達式,這樣如果列名重構,則自動會重構這段代碼,不需要作手工修改 > BeetlSQL推薦一直使用LambdaQuery,Query是JDK7以前的使用方式
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