Starting with JDBC driver 12.10, the following resultset will be null and seems to ignore the select statement at the end. This is a regression from previous JDBC driver versions before 12.10. It is ...

3. 谨慎处理查询中的NULL值：在编写SQL查询语句时，要充分考虑NULL值的影响，避免直接对NULL值进行判断和计算。 可以使用IS NULL、IS NOT NULL等运算符来显式地处理NULL值，或者使用COALESCE、NULLIF等函数来替换NULL值为指定的值。 三、谨慎操作NULL值 ...

Null values can be a significant hurdle in data transformation, particularly when dealing with financial data. While Power Query provides various methods to tackle these null values, the coalesce ...

Finally, you need to be aware of the potential pitfalls. Using NULL can lead to data inconsistency, especially if multiple users update the same data. It can also complicate queries, requiring more ...

The lack of information within relational databases expressed as NULL values presents a problem in ensuring the quality of data and the information retrieved by SQL queries. This is so because there ...

Query Store is one of the most powerful database-scoped features in SQL Server for troubleshooting performance and improving the stability of your database.

Now I’m not a DBA or any kind of database tuning expert so I can’t comment on why a SQL query performs the way it does on any given platform, but what I can do is show you two examples of how the ...

正向解析 binlog 生成 SQL 看并无问题，binlog 里记录的确实是 '' （空）值。但是通过查看线上表数据发现，在 有 JSON NOT NULL 类型的约束下，对应的回滚 SQL 主键值竟然是 NULL 值！ 这和 binlog 里记录的 '' （空）值不一致。