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diff --git a/‎database/code/09索引.sql‎
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diff --git a/‎database/code/JDBC/.idea/workspace.xml‎
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diff --git a/‎database/code/JDBC/out/production/JDBC/com/mashibing/dao/impl/BatchDaoImpl.class‎
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diff --git a/‎database/code/JDBC/out/production/JDBC/com/mashibing/dao/impl/EmpDaoImpl2.class‎
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diff --git a/‎database/code/JDBC/out/production/JDBC/com/mashibing/entity/Dept.class‎
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diff --git a/‎database/code/JDBC/out/production/JDBC/com/mashibing/reflect/BaseDaoImpl.class‎
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diff --git a/‎database/code/JDBC/out/production/JDBC/com/mashibing/reflect/ClassAPI.class‎
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diff --git a/‎database/code/JDBC/out/production/JDBC/com/mashibing/reflect/CreateClassObject.class‎
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diff --git a/‎database/code/JDBC/out/production/JDBC/com/mashibing/reflect/Person.class‎
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diff --git a/‎database/code/JDBC/out/production/JDBC/com/mashibing/reflect/Student.class‎
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@@ -0,0 +1,6 @@
+--索引：加快数据的检索
+--创建索引
+create index i_ename on emp(ename);
+--删除索引
+drop index i_ename;
+select * from emp where ename = 'SMITH';