jooq query for sql 具有分析功能的查询

Question

我有 sql 个类似

的查询

select *
from (
   select s.*, max(year) over () max_year
   from Transaction s
   where s.Account_Number     = '4234242234'
     and s.month in (0,1)) o
where o.year=o.max_year;

我需要用 jOOQ 编写，任何帮助。我尝试了以下

dslContext.select(Transaction.BANK,
                    Transaction.ACCOUNT,
                    Transaction.AMOUNT,
                    max(Transaction.YEAR).over())
            .from(Transaction)
            .where(Transaction.BANK.eq(bank))
            .and(Transaction.MONTH.in((byte) 0, (byte) 1))
            .fetchInto(Transaction.class);

此外，有什么方法可以避免列出 select 中的所有列。而不是

select(Transaction.BANK,
       Transaction.ACCOUNT,
       Transaction.AMOUNT,
       max(Transaction.YEAR).over())

类似

select(Transaction.*,
       max(Transaction.YEAR).over())

Answer 1

派生的table可以这样构造：

// Assuming this static import, as always:
import static org.jooq.impl.DSL.*;

// Create aliased column expression for later reuse
Field<Integer> maxYear = max(Transaction.YEAR).over().as("max_year");

// Create derived table
Table<?> o = select(Transaction.asterisk(), maxYear)
            .from(Transaction)
            .where(Transaction.BANK.eq(bank))
            .and(Transaction.MONTH.in((byte) 0, (byte) 1))
            .asTable("o");

// Use derived table and dereference fields from it using Table.field(Field)
ctx.select()
   .from(o)
   .where(o.field(Transaction.YEAR).eq(o.field(maxYear)))
   .fetch();

Also, is there any way to avoid listing all columns in select

您正在寻找 Table.asterisk() to produce the asterisk in SQL, or Table.fields() 从您生成的代码中生成所有字段。

jooq query for sql 具有分析功能的查询

jooq query for sql query with analytical function

java

sql

oracle

jooq