select * from v$parameter_valid_values; select * from v$parameter_valid_values where name like '%recyclebin%'; VALUE :表示参数可以设置的值 ISDEFAULT :参数的默认值 Oracle参数 1.2. oracle pfile/spfile区别 pfile 默认的名称为“init+例程名.ora”文件路径:E:\oracle\product\10.2.0\db_1\dbs,这是...
The PL/SQL block inExample 6-10queries multiple values into PL/SQL tables, with and without bulk binds. Without bulk bind, PL/SQL sends a SQL statement to the SQL engine for each selected employee, leading to context switches that slow performance. Example 6-10 SELECT Statements that Referen...
drop table employees; create table employees(employee_id int, salary int, raise int, job_id varchar(16), last_name varchar(16), first_name varchar(16)); insert into employees values (1, 1000, 60, 'ST_CLERK', 'Geller', 'Rose'); insert into employees values (2, 2000, 100, 'ST_CL...
PL/SQL "continue" keyword- This will allow a "C-Like" continue in a loop, skipping an iteration to bypass any "else" Boolean conditions. A nasty PL/SQL GOTO statement is no longer required to exit a Boolean within a loop. Oracle professionalJurgen Kemmelingshas an excellent...
Runs the SQLcl statements in the specified script. The script can be called from the local file system or a web server. You can pass values to script variables in the usual way. @@ { url | file_name[.ext] } [arg ...] Runs the SQLcl statements in the specified script. This com...
Note that the queries return the same values regardless of whether they are issued before or after the year 2000. The RR datetime format element lets you write SQL statements that will return the same values from years whose first two digits are different. ...
Protect databases against SQL injection attacks — including zero-day attacks —with SQL Firewall. Manage data across multiple regions while meeting data residency regulations using Globally Distributed Database with RAFT replication. Use the same technology whether your data lives on-premises or in Or...
创建表成功后,我们插入3条数据,id分别是1,100,200,sql如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 insert into t_operate_log values(1, '1', sysdate); insert into t_operate_log values(100, '1', sysdate); insert into t_operate_log values(200, '1', sysdate); 下面这3条sql...
Even though the filter clause was introduced with SQL:2003, it is hardly supported today. Luckily, this is not a big problem because case can be used for the very same purpose. The trick is to map values that do not satisfy the filter criteria to neutral values, which do not change the...
Multiple rows with identical values are sorted in ascending order by rowid. ORDERBY clause, and do not rely on an index. If an index can be used to satisfy an ORDERBY 《Oracle SQL高级编程》相关知识如图: 此时已经有了PRIMARY KEY约束。 SQL> alter system flush buffer_cache; 系统已更改。