新值1: select * from dual where 100=100 DUM --- X 9.2 定义用户变量 variable store@TEST11G> variable v1 number; store@TEST11G> exec :v1:=1; PL/SQL 过程已成功完成。 store@TEST11G> print v1 V1 --- 1 store@TEST11G> select :v1 from dual; :V1 --- 1 store@TEST11G> declare ...
sql>select ename from emp where empno=:no; ename --- scott sql> variable x number; sql> exec :x := 7788; sql> SELECT empno,ename from scott.emp where empno=:x; (8)print 该命令用于输出绑定变量结果,eg: SQL> print no NO --- 7788 7.显示和设置环境变量 使用sql*plus的环境变量可以控...
sql>select ename from emp where empno=:no; ename --- scott sql> variable x number; sql> exec :x := 7788; sql> SELECT empno,ename from scott.emp where empno=:x; (8)print 该命令用于输出绑定变量结果,eg: SQL> print no NO --- 7788 7.显示和设置环境变量 使用sql*plus的环境变量可以控...
SELECT USER FROM DUAL; 查看数据库版本 SELECT * FROM V$VERSION; 列出所有表 SELECT * FROM TABLE_NAME; 创建新表 CREATE TABLE table_name ( column1 datatype, column2 datatype, ... ); 插入数据 INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...); 更新...
OLD_V[ALUE] variable ON|OFF WRA[PPED] | WOR[D_WRAPPED] | TRU[NCATED] 7.1. 改变缺省的列标题 :COLUMN column_name HEADING column_heading SQL> select * from scott.dept; DEPTNO DNAME LOC --- --- --- 10 ACCOUNTING NEW YORK SQL> col loc heading...
ALI[AS]aliasCLE[AR]FOLD_A[FTER]FOLD_B[EFORE]FOR[MAT]formatHEA[DING]textJUS[TIFY]{L[EFT]|C[ENTER]|C[ENTRE]|R[IGHT]}LIKE{expr|alias}NEWL[INE]NEW_V[ALUE]variableNOPRI[NT]|PRI[NT]NUL[L]textOLD_V[ALUE]variableON|OFFWRA[PPED]|WOR[D_WRAPPED]|TRU[NCATED] ...
OLD_V[ALUE] variableON|OFF WRA[PPED]|WOR[D_WRAPPED]|TRU[NCATED] 1). 改变缺省的列标题 COLUMN column_name HEADING column_heading For example: Sql>select * from dept; DEPTNO DNAME LOC 10 ACCOUNTING NEW YORK sql>col LOC heading location ...
DEFINE department_name = '销售部'; SELECT * FROM employees WHERE department_name = '&department_name'; 复制代码 命令行编辑: 使用SQLPlus的内置命令行编辑功能,如SET EDITOR vi设置默认编辑器,提高编写效率。 调试和错误处理: 使用PL/SQL的异常处理机制来捕获和处理运行时错误。例如: DECLARE v_variable VAR...
SQL> variable v_date char(10) SQL> set autoprint on 下面PL/SQL执行成功后将自动打印出绑定变量的值。 SQL> begin 2 select to_char(sysdate,'yyyy-mm-dd') into :v_date from dual; 3 end; 4 / PL/SQL过程已成功完成。 V_DATE --- 2007-05-21 5.AUTORECOVERY [ON|OFF] ON设置RECOVER命令自...
常⽤：sqlplus username/password 如：普通⽤户登录 sqlplus scott/tiger sqlplus username/password@net_service_name 如: sqlplus scott/tiger@orcl sqlplus username/password as sysdba 如：sqlplus sys/admin as sysdba sqlplus username/password@//host:port/sid 注意：sys和system需要以sysdba登录 在进⼊sql...