oracle sql by example

bound variable in the PGA. Ideally, the actual length is the number of allocations, but this is cumbersome to deal with, in order to simplify, Oracle divided the above four levels. A fixed allocation of 32 bytes of memory for a bound variable of length within the first level; a binding variable of length in the second level allocates 128 bytes of memory; A binding variable of length in the third level allocates 2000 bytes of memory, and a bound varia

both Oracle and SQL Server follow the SQL-92 standard: http://owen.sj.ca.us/rkowen/howto/sql92F.html , but there are some differences, the difference is as follows: Oracle table name, field name, stored procedure name, variable name cannot exceed 30 string lengths. The top syntax is not supported in

Oracle lock table troubleshooting example: Oracle lock table troubleshooting One time a developer directly runs the delete table operating system on the database server during peak hours, resulting in no response for a long period of execution. Then, the SQLPLUS client is closed and the delete statement is run again, this causes the database to run slowly.The que

Tags: http io sp CTI on C SQL R BSWhere is the Oracle SQL Developer connection information saved?Oracle SQL Developer connection information is missing after switching the logged-on user. As long as the previous user information still exists, you can C:\Users\ the user name

functions.1. Detailed process Example 1.1 We consider the following given SQL: select sysdate from dual; Run and query v $ SQL in Oracle 10 Gb. The SQL _ID of this SQL statement is SQL

Oracle uses a single cursor to insert data. For example, oracle cursor Original works, from "Deep Blue blog" blog, deep blue blog: http://blog.csdn.net/huangyanlong/article/details/47143731Background Recently, some friends asked me how to insert multiple pieces of data into the target table in a single way. To solve this problem, let's make a small experiment. T

Oracle materialized view code example, oracle Materialized View Materialized View of Oracle Recently, oracle materialized views have been updated based on the project business needs. You can search for information on this topic on the Internet to facilitate improvement. The

Oracle cold, stay at home and read the "Mastering Oracle SQL" 2nd, found that Oracle's function is still very strong, there are 200 optical functions, hsql is difficult to match. The next stubborn, it seems either to risk using Hibernate3.0 SQL mapping function, or to run the JDBC assembly VO. 1. Report Totals dedicate

Method 1: As we all know, to connect to Oracle using PL/SQL, you need to install the Oracle client software. Have you ever wondered whether to directly connect to Oracle without installing the Oracle client? In fact, I always wanted to do this, because this client is so

Oracle tablespace to view SQL usage, oracle tablespace SQL In daily work, the most important thing for DBA is to check the usage of the tablespace to check whether the tablespace is full. The procedure is as follows: Step 1: Open PLSQL Step 2: Create an SQL window Step 3: E

"annual Salary"From EMP ORDER by 3 DESC;SELECT ename,job,sal from emp ORDER by Job,sal DESC;SELECT ename,job,sal from emp ORDER by Empno;Modify Default display widthSET line[size] {80|n}SET Line 100L display the SQL statement in the buffer you just enteredN Text modified section of error'/' (run) commandSAVEGET@ or Start command when the specified script file contents are loaded into the SQL buffer to runS

Today, I am working on an OA report. I use a stored procedure to calculate some data. When doing a for xxx in xxxx loop end loop; loop, I never knew it was Mao. I can't catch the no_data_found exception in for any more. Once this no_data_found Oracle occurs, it automatically jumps out of the for loop, but I don't know what went wrong, that was depressing for an hour. Shit. Later I remembered that pl/SQL too

Today, I am working on an OA report. I use a stored procedure to calculate some data. When doing a for XXX in xxxx loop end loop; loop, I never knew it was Mao. I cannot catch the no_data_found exception in for any more. Once this no_data_found occurs Oracle will automatically Jump Out Of The for loop, but I don't know where the error occurred. It was a depressing hour. Shit. Later I remembered that PL/SQL