sql语句练习题单表+多表各四套

[{"title":"（ 19 个子文件 22KB ） sql语句练习题单表+多表各四套","children":[{"title":"SQL练习","children":[{"title":"单表","children":[{"title":"单表第三套","children":[{"title":"需求.txt <span style='color:#111;'> 1002B </span>","children":null,"spread":false},{"title":"建表语句.txt <span style='color:#111;'> 1.76KB </span>","children":null,"spread":false},{"title":"答案.sql <span style='color:#111;'> 1.34KB </span>","children":null,"spread":false}],"spread":true},{"title":"单表第一套","children":[{"title":"1.数据引入.txt <span style='color:#111;'> 677B </span>","children":null,"spread":false},{"title":"2.练习题.txt <span style='color:#111;'> 755B </span>","children":null,"spread":false},{"title":"答案.sql <span style='color:#111;'> 1.66KB </span>","children":null,"spread":false}],"spread":true},{"title":"单表第四套","children":[{"title":"需求.txt <span style='color:#111;'> 2.12KB </span>","children":null,"spread":false},{"title":"建表语句.txt <span style='color:#111;'> 2.51KB </span>","children":null,"spread":false},{"title":"答案.sql <span style='color:#111;'> 3.46KB </span>","children":null,"spread":false}],"spread":true},{"title":"单表第二套","children":[{"title":"1.作业：查询.txt <span style='color:#111;'> 1.15KB </span>","children":null,"spread":false},{"title":"答案.sql <span style='color:#111;'> 1.32KB </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"多表","children":[{"title":"多表第一套","children":[{"title":"需求.txt <span style='color:#111;'> 1.73KB </span>","children":null,"spread":false},{"title":"建表语句.txt <span style='color:#111;'> 2.51KB </span>","children":null,"spread":false},{"title":"答案.sql <span style='color:#111;'> 2.58KB </span>","children":null,"spread":false}],"spread":true},{"title":"多表第二套","children":[{"title":"1.数据引入.txt <span style='color:#111;'> 4.79KB </span>","children":null,"spread":false},{"title":"2.基础练习题.txt <span style='color:#111;'> 1.03KB </span>","children":null,"spread":false}],"spread":true},{"title":"多表第三套","children":[{"title":"表结构.txt <span style='color:#111;'> 3.29KB </span>","children":null,"spread":false},{"title":"练习题.txt <span style='color:#111;'> 1.69KB </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"答案.zip <span style='color:#111;'> 7.02KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]