MySql教程

mysql-慢sql优化

本文主要是介绍mysql-慢sql优化,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!

1.

SELECT PLAT_BATCH_CODE FROM t_fee_fact_record t WHERE t.SALES_CHANNEL = ? AND t.PAY_STATUS IN (?) AND t.FEE_STATUS != ? AND t.ISCLEAN = ? AND t.processing = ? AND TIMESTAMPDIFF(MINUTE, t.OPERATE_TIME, now()) >= ?

 优化建议:

1).
t.FEE_STATUS != '1' 改成
AND t.FEE_STATUS in('0','2','3')
2).
java中计算TIMESTAMPDIFF(MINUTE, t.OPERATE_TIME, now())

 

2.

SELECT weixin_id FROM wcap_user_binding_rs WHERE check_status IS NULL ORDER BY bindingtime ASC LIMIT ?

 优化建议:


check_status 改为默认空字符串

3.

 

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