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  1. en.wikipedia.org › wiki › 20032003 - Wikipedia

    1 day ago · 2003 ( MMIII) was a common year starting on Wednesday of the Gregorian calendar, the 2003rd year of the Common Era (CE) and Anno Domini (AD) designations, the 3rd year of the 3rd millennium and the 21st century, and the 4th year of the 2000s decade. 2003 was designated by the United Nations as the International Year of Freshwater [1] In 2003, a ...

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  3. securityaffairs.com › 165784 › mobile-2FBI unlocked the phone of the suspect in the assassination ...

    7 hours ago · The FBI gained access to the password-protected phone of the suspect in the assassination attempt on Donald Trump.

  4. www.americantowns.com › cheyenne-wy › gas-pricesCheyenne, WY Gas Prices - AmericanTowns.com

    7 hours ago · Cheyenne Gas Prices - Find the Lowest Gas Prices in Cheyenne, WY Search for the lowest gasoline prices in Cheyenne, WY. Find local Cheyenne gas prices and Cheyenne gas stations with the best prices to fill up at the pump today

  5. blog.csdn.net › jy739761380 › article史上最实用的MySQL调优策略（二） - CSDN博客

    1 day ago · 1.1.什么是执行计划 有了慢查询语句后，就要对语句进行分析。一条查询语句在经过 MySQL查询优化 器的各种基于成本和规则的优化会后生成一个所谓的执行计划，这个执行计划展示了接下来具体执行查询的方式，比如多表连接的顺序是什么，对于每个表采用什么访问方法来具体执行查询等等。EXPLAIN语句来帮助我们查看某个查询语句的具体执行计划，我们需要搞懂EPLATNEXPLAIN ...

  6. blog.csdn.net › 2401_85367911 › articleMySQL中UNION与UNION ALL的区别 - CSDN博客

    7 hours ago · 注意：UNION 结果集中的列名总是等于 UNION 中第一个 SELECT 语句中的列名。. tips：UNION 相同的列只会列出一次，只会选取不同的值。. 请使用 UNION ALL 来选取重复的值！. 俗话说，好学者临池学书，不过网络时代，对于大多数的我们来说，我倒是觉得学习意识的觉醒 ...

  7. boc.gbase.cn › knowledge › knowledeg-1528南大通用产品文档：GBase8a数据库sql使用的优化建议

    7 hours ago · 游标的操作类似将每行的值取出来，做一系列处理。如果可以去掉游标，改成一条包含多个相关子查询的SQL，性能将大大提升。 2.尽量使用VARCHAR不用CHAR CHAR的空格可能影响性能；

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