- SQL语句在线练习 http://sample.jimstone/xsql/
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SQL语句测验 http://www.w3school/quiz/quiz.asp?quiz=sql
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sql语句练习50题(Mysql版) https://blog.csdn/fashion2014/article/details/78826299/
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http://sqlfiddle/
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http://zh.sqlzoo/wiki/SELECT_basics/zh
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https://sqlbolt/lesson/select_queries_introduction
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https://www.w3resource/sql-exercises/sql-retrieve-from-table.php
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MySQL等 SQL语句在线练习
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