wyxDBMS：使用Java实现了一个关系型数据库，DBMS数据库管理系统，可使用常用增删改改查的S​​QL语句，具有数据字典，数据索引文件，并且实现了启发式查询优化

[{"title":"（ 39 个子文件 35KB ） wyxDBMS：使用Java实现了一个关系型数据库，DBMS数据库管理系统，可使用常用增删改改查的S​​QL语句，具有数据字典，数据索引文件，并且实现了启发式查询优化","children":[{"title":"wyxDBMS-master","children":[{"title":"wyxDBMS.iml <span style='color:#111;'> 507B </span>","children":null,"spread":false},{"title":"src","children":[{"title":"Join.java <span style='color:#111;'> 6.51KB </span>","children":null,"spread":false},{"title":"User.java <span style='color:#111;'> 3.69KB </span>","children":null,"spread":false},{"title":"JoinCondition.java <span style='color:#111;'> 2.93KB </span>","children":null,"spread":false},{"title":"Test.java <span style='color:#111;'> 145B </span>","children":null,"spread":false},{"title":"Field.java <span style='color:#111;'> 532B </span>","children":null,"spread":false},{"title":"Table.java <span style='color:#111;'> 24.04KB </span>","children":null,"spread":false},{"title":"IndexKey.java <span style='color:#111;'> 1.66KB </span>","children":null,"spread":false},{"title":"SingleFilter.java <span style='color:#111;'> 1.68KB </span>","children":null,"spread":false},{"title":"StringUtil.java <span style='color:#111;'> 7.22KB </span>","children":null,"spread":false},{"title":"Index.java <span style='color:#111;'> 381B </span>","children":null,"spread":false},{"title":"IndexTree.java <span style='color:#111;'> 3.37KB </span>","children":null,"spread":false},{"title":"Relationship.java <span style='color:#111;'> 6.17KB </span>","children":null,"spread":false},{"title":"Operating.java <span style='color:#111;'> 16.83KB </span>","children":null,"spread":false},{"title":"IndexNode.java <span style='color:#111;'> 702B </span>","children":null,"spread":false}],"spread":false},{"title":".idea","children":[{"title":"misc.xml <span style='color:#111;'> 273B </span>","children":null,"spread":false},{"title":"uiDesigner.xml <span style='color:#111;'> 8.59KB </span>","children":null,"spread":false},{"title":"inspectionProfiles","children":[{"title":"Project_Default.xml <span style='color:#111;'> 1.41KB </span>","children":null,"spread":false}],"spread":true},{"title":"modules.xml <span style='color:#111;'> 254B </span>","children":null,"spread":false},{"title":"vcs.xml <span style='color:#111;'> 180B </span>","children":null,"spread":false}],"spread":true},{"title":"dir","children":[{"title":"sql.txt <span style='color:#111;'> 370B </span>","children":null,"spread":false},{"title":"user1","children":[{"title":"user.info <span style='color:#111;'> 95B </span>","children":null,"spread":false},{"title":"db1","children":[{"title":"table1","children":[{"title":"table1.index <span style='color:#111;'> 2.61KB </span>","children":null,"spread":false},{"title":"table1.dict <span style='color:#111;'> 80B </span>","children":null,"spread":false},{"title":"data","children":[{"title":"1.data <span style='color:#111;'> 356B </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"table2","children":[{"title":"table2.dict <span style='color:#111;'> 71B </span>","children":null,"spread":false},{"title":"table2.index <span style='color:#111;'> 3.11KB </span>","children":null,"spread":false},{"title":"data","children":[{"title":"1.data <span style='color:#111;'> 332B </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"employee","children":[{"title":"employee.index <span style='color:#111;'> 33.89KB </span>","children":null,"spread":false},{"title":"employee.dict <span style='color:#111;'> 127B </span>","children":null,"spread":false},{"title":"data","children":[{"title":"3.data <span style='color:#111;'> 935B </span>","children":null,"spread":false},{"title":"5.data <span style='color:#111;'> 949B </span>","children":null,"spread":false},{"title":"1.data <span style='color:#111;'> 579B </span>","children":null,"spread":false},{"title":"2.data <span style='color:#111;'> 952B </span>","children":null,"spread":false},{"title":"4.data <span style='color:#111;'> 925B </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"table3","children":[{"title":"table3.index <span style='color:#111;'> 941B </span>","children":null,"spread":false},{"title":"data","children":[{"title":"1.data <span style='color:#111;'> 15B </span>","children":null,"spread":false}],"spread":true},{"title":"table3.dict <span style='color:#111;'> 24B </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}],"spread":true},{"title":"README.md <span style='color:#111;'> 3.32KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]