1.对查询进行优化,应尽量避免全表扫描,首先应考虑在 where 及 order by 涉及的列上建立索引。
2.应尽量避免在 where 子句中对字段进行 null 值判断,否则将导致引擎放弃使用索引而进行全表扫描,
Sql 代码 : select id from t wh…
We believe our research will eventually lead to artificial general intelligence, a system that can solve human-level problems. Building safe and beneficial AGI is our mission. ---- OpenAI 通用人工智能 AGI 作为 AI 的终极形态,是 AI 行业内追求的演…