select TRADE_REQUEST_ID tradeRequestId, INTERNAL_DEPARTMENT_CODE internalDepartmentCode, TP_PAY_ORGAN_ID tpPayOrganId, PAY_AMOUNT payAmount, FEE fee from( select orderInfo.TRADE_REQUEST_ID, orderInfo.INTERNAL_DEPARTMENT_CODE, orderInfo.TP_PAY_ORGAN_ID, orderInfo.PAY_AMOUNT, orderInfo.FEE, ROWNUM r from T_PAY_SYNC_RECONCILE_AC_TASK orderInfo where ORDERINFO.STATUS = '0' AND ORDERINFO.ORG_MER_DATE BETWEEN TRUNC(#startDate:DATE#)+ #syncStartDay:NUMBER# + #syncStartTime:NUMBER#/ (24) and TRUNC(#startDate:DATE#)+ #syncEndDay:NUMBER# + #syncEndTime:VARCHAR#/ (24) )table_a <![CDATA[ where r>#firstIndex:NUMBER# and r<=#endIndex:NUMBER# ]]> 优化这段SQL语句

优化这段SQL语句可以进行以下步骤：

1. 使用INNER JOIN替代子查询：将子查询部分改写为一个JOIN子句，以提高查询性能。
2. 使用绑定变量代替占位符：使用绑定变量可以提高SQL执行的效率。
3. 添加索引：为相关的列添加索引，以加快查询速度。

以下是优化后的SQL语句：

SELECT TRADE_REQUEST_ID tradeRequestId,
       INTERNAL_DEPARTMENT_CODE internalDepartmentCode,
       TP_PAY_ORGAN_ID tpPayOrganId,
       PAY_AMOUNT payAmount,
       FEE fee
FROM (
    SELECT orderInfo.TRADE_REQUEST_ID,
           orderInfo.INTERNAL_DEPARTMENT_CODE,
           orderInfo.TP_PAY_ORGAN_ID,
           orderInfo.PAY_AMOUNT,
           orderInfo.FEE
    FROM T_PAY_SYNC_RECONCILE_AC_TASK orderInfo
    INNER JOIN ORDERINFO ON orderInfo.TRADE_REQUEST_ID = ORDERINFO.TRADE_REQUEST_ID
    WHERE ORDERINFO.STATUS = '0'
    AND ORDERINFO.ORG_MER_DATE BETWEEN TRUNC(:startDate) + :syncStartDay/24 AND TRUNC(:startDate) + :syncEndDay/24
) table_a
WHERE ROWNUM > :firstIndex AND ROWNUM <= :endIndex;

请在实际使用中替换掉`:startDate`、`:syncStartDay`、`:syncEndDay`、`:firstIndex`和`:endIndex`这些绑定变量，并根据具体情况为相关列添加索引。