SQL online exercise URL

Find an SQL online exercise website. when I learned SQL statements before, I found an online exercise website. a series of questions are posted on the web page, then, enter and execute the SQL statement at the bottom of the question. if the SQL statement is correct, the execution result is displayed. if the SQL statement is incorrect, an error occurs. I cannot find this website. do you have a good website to practice SQL online? It is best to use mys to find a web site for SQL online exercises
Find a Web site for SQL online exercises

When I used to learn SQL statements, I found a Web site for online exercises, posted a series of questions on the web page, and then I had to enter the SQL statement and execute it myself below the question, if the statement is correct, the execution result is displayed. if the statement is incorrect, an error occurs.
I cannot find this website. do you have a good website to practice SQL online?
It is best to use mysql, which can be SQL without mysql.

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Install MySQL locally and use phpMyAdmin to manage and practice. Http://www.phpmyadmin.net/home_page/index.php
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Http://sqlzoo.cn/
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(⊙ O ⊙) Oh, incorrect understanding. There are many such questions:
Http://www.baidu.com? Wd = SQL % C1 % B7 % CF % B0 % CC % E2 & rsv_bp = 0 & rsv_spt = 3
Http://bbs.iufida.com/thread-91261-1-1.html