我有一个查询,当我在一个配置了字符集合的数据库中执行3个表的联合时,我需要一段时间来执行43sg,在另一个配置了字符集合AL32UTF8的数据库中,它需要4sg。在查询时,字符集合扮演着什么角色?我的问题如下:
select name from empleados where username='Ari' and rol in ('limpiador', 'recursos humanos', 'docente', 'alumno') union select name from grupo1 inner join
如果我的一些方法使用java类或接口,例如:Collection<MyClass> names = new ArrayList<>();我如何链接原始java.util文档的集合或ArrayList?/**
* The constructor using with {@link Collection} - interface and {@link ArrayList} - class for initialize
root@akbar:/home/akbar# /etc/init.d/oracle-xe-18c configure
/bin/df: unrecognized option '--direct'Oracle recommends that the password entered should be at least 8 characters in length, contain at least1 uppercase character, 1
我用的是Oracle Database 10g xe universal Rel.10.2.0.1.0 against cx_Oracle-5.0.4-10g-unicode-py26-1.x86_64on a django project on Ubuntu 10.04
我的db由Oracle 10gr2 enterprise edition生成(在Windows上,导入用US7ASCII characterset and AL16UTF16 NCHAR character set完成,导入服务器使用A
考虑下表,其中一列为可空NVARCHAR类型 ID NUMBER(10) NOT NULL, at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:452static final String SQL = "INSERT INTO CHARACTER_SET_