create profile文件名limit failed_logon_attempts3password_lock_time2 ---设置用户名输错3次账号锁定2天,2天后才能使用 alert user用户名profile文件名 ---分配文件(把输错次数就锁用户的方法分配给某个用户(完成输入错误3次锁2天)) ---(2)账号解锁 alter user用户名account unlock---被锁的用户进行解锁 ...
使用SELECT * FROM students时,SELECT是关键字,表示将要执行一个查询,*表示“所有列”,FROM表示将要从哪个表查询,本例中是students表。 该SQL将查询出students表的所有数据。注意:查询结果也是一个二维表,它包含列名和每一行的数据。 要查询classes表的所有行,我们用如下SQL语句: 代码语言:javascript 代码运行次数:0...
或应用索引表未初始化的 TOO_MANY_ROWS 执行 select into 时,结果集超过一行 ZERO_DIVIDE 除数为 0 SUBSCRIPT_BEYOND_COUNT 元素下标超过嵌套表或 VARRAY 的最大值 SUBSCRIPT_OUTSIDE_LIMIT 使用嵌套表或 VARRAY 时,将下标指定为负数 VALUE_ERROR 赋值时,变量长度不足以容纳实际数据 LOGIN_DENIED PL/SQL 应用...
SQL>--声明部分SQL>declare2--说明部分3begin4--程序部分5dbms_output.put_line('Hello World');6end;7--退出编辑环境,并执行PL/SQL程序8/PL/SQL过程已成功完成。SQL>--默认情况下,Oracle的输出开关是关闭的。SQL>--如果要在屏幕上输出信息,需要将 serveroutput开关打开setserveroutput onSQL>setserveroutput...
SQL*Plus是Oracle提供的访问数据库服务器的客户端软件,是Oracle的核心组件,也是Oracle DBA最常用的工具。 1.1 sqlplus命令 sqlplus连接数据库的时候如果不写"@字符串"的话走的是ORACLE_SID路径,如果加上的话走的是TNSNAMES.ORA文件 C:\Users\Administrator>sqlplus /?
DBMS_OUTPUT.PUT_LINE('数据库中没有编码为'||v_empno||'的员工'); WHEN TOO_MANY_ROWS THEN DBMS_OUTPUT.PUT_LINE('程序运行错误!请使用游标'); WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE(SQLCODE||'---'||SQLERRM); END; 1. 2. 3. 4. ...
Directory created.SQL> create table alert_logs(text varchar2(2000))organization external(type oracle_loaderdefault directory bdumpaccess parameters(records delimited by newlinefieldsreject rows with all null fields)location('alert_GSP.log'))reject limit unlimited;Table created.SQL> select * from ...
SET HISTORY LIMIT N allows you to change the default limit, where N is the maximum number. History is retained between SQLcl sessions. By default, the SHOW, HISTORY, CONNECT, and SET commands are not saved in history. SET HISTORY BLACKLIST allows you to set the commands that should not ...
Set the Import Row Limit to 100 to be able to view 100 rows at a time. This helps while working with large files. Set a value for the Preview File Read Maximum. This ensures that the entire file is not read into the memory. 3 . Expand File Formats in the preferences na...
If a seeded region has a customization level of Limit, then its views can have customization levels of Limit or Core. If a seeded region has a customization level of User, then its views can have customization levels of User, Limit, or Core. Similarly, a view's customization level determin...