migrate oracle to mysql

Comparison of some simple commands of Oracle and mysql1) SQL> select to_char (sysdate, 'yyyy-mm-dd') from dual;SQL> select to_char (sysdate, 'hh24-mi-ss') from dual;Mysql> select date_format (now (), '% Y-% m-% D ');Mysql> select time_format (now (), '% H-% I-% s ');Date FunctionsAdd a month:SQL> select to_char (add_months (to_date ('201312', 'yyyymmdd'), 1), 'yy

The following articles teach you how to create an auto-incrementing field in MySQL and Oracle databases. We all know Oracle (large website database platform) the following figure shows the 100 questions that database beginners must know. Oracle (large website database platform) PL/SQL language basics Basic knowledge

BrieflyInstallShield has built-in support for MySQL and Oracle. However, this functionality is implemented through ODBC, which is very strict in the format of SQL scripts, so the scripts that have been tested by the official client are often given an error when executed in is.In general, database scripting is guaranteed only through official client testing, while maintaining a script that is executed by the

, JBoss, Zend, and Sleepycat have not commented on this. The above transaction reflects the adjustment of Oracle's development strategy from one aspect, and the company has decided to change open source code technology from threat to opportunity. Open-source products are generally free of charge, or related software vendors only charge users for technical support. With this advantage, open-source products bring great pressure to enterprise software. The enterprise software market has become one

Tags: unzip strong 3.1.1 MySQL Oracle third party reference images Tor1. Download Oracle SQL Developer Third-party database driver on Oracle website Download page: http://www.oracle.com/technetwork/developer-tools/sql-developer/thirdparty-095608.html Download the MySQL Drive

Process---database-Object Process-Server-User-Object Process-database-User-Schema-Object Mysql, Oracle, and Db2 I have never performed oracle multi-instance operations, and db2 is just getting started with it. Mysql is the easiest way to think of. The difference between Database and User is that authorization is used t

The following summarizes the MySQL conversion Oracle several points of attention, I hope to help. 1. Automatic growth of data type processing MySQL has an automatically growing data type, and the data value is automatically obtained when you insert a record without manipulating this field. Oracle does not have an au

1,oracle no offet,limit, in MySQL we use them to control the number of rows displayed, most of it is paging. If Oracle is paging, replace it with RowNum.2,oracle Build the table, there is no auto_increment, all want to let the table of a field self-increment, to add the sequence itself, insert, the value of the sequenc

Http://www.linuxidc.com/Linux/2014-02/97335.htmThe first two days of leadership gave a live, database migration, the original system is used by the Oracle database, now to change to MySQL, then did not think about the next, the original system with the framework of SSI, so probably wanted to make adjustments to the following pointsFirst Database migrationModification of the second applicationThe following i

The first two days of leadership gave a live, database migration, the original system is used by the Oracle database, now to change to MySQL, then did not think about the next, the original system with the framework of SSI, so probably wanted to make adjustments to the following pointsFirst Database migrationModification of the second applicationThe following is a detailed procedure forA Database migrationT

I have been studying Oracle and MySQL for some time. Now I want to make a summary and compare it, and I hope it will be helpful to you! MySQL installation and Environment I have been studying Oracle and MySQL for some time. Now I want to make a summary and compare it, and I

1. Usage rules for group functions: The group functions in MySQL are free to use in SELECT statements, but if there are group functions in the query in Oracle, The other column names must be processed by the group function, or columns in the GROUP BY clause, and negative will be an error. 2, automatic growth of data type processing: MySQL has an automatic gro

If you want to give you a minute to become the president of Oracle, you don't need to wear Larry Ellison's expensive suit on his yacht, but let you decide the fate of MySQL, what do you do? I just spent 7.4 billion yuan to acquire Sun Microsystems, and the European Commission for anti-monopoly investigations suddenly moved out of this everyone's favorite open-source database to find you. How do you choose?

I don't know how many people know clearly. in Oracle, if a composite index is used, assume that one of the three fields of the index (a, B, c) is deleted (including unused, how Does Oracle handle this index. Similarly, what should Oracle do if it is a constraint? Using Oracle as an example, I made a comparison with

This article mainly introduces the advantages and disadvantages of SQL Server, Mysql, Oracle Three kinds of databases, the need for friends can refer to the followingfirst, SQL ServerAdvantages:Ease of use, scalability for distributed organizations, data warehousing for decision support, integration with many other server software, and good price/performance ratio;Provides flexibility for data management an

Databases have many processing models for hierarchies. You can design models based on your needs. Of course, the simplest and easiest model to design is the so-called adjacent model. In this regard, other databases, such as Oracle, provide the ready-made analysis method connectby, while MySQL seems a little weak in this regard. However, you can use MySQL to store

Compare the date difference between MySQL and Oracle by using a create statement Today, a developer submitted an SQL change and found a problem during deployment.A statement is a simple create statement.Create table 'test _ user '('Openid' varchar (64) not null,'Amount 'varchar (11) DEFAULT 0,'Create _ time' datetime DEFAULT CURRENT_TIMESTAMP,'Update _ time' datetime DEFAULT CURRENT_TIMESTAMP,Primary key ('

MySQL trigger is only activated by statement. You cannot write two triggers to the same event of the same table. The same event refers to the trigger _ MySQL trigger is only activated by statement. You cannot write two triggers to the same event of the same table. The same event refers to the trigger _ The MySQL trigger is only activated by statement and can

This article mainly introduces the nine differences between Oracle and mysql. For more information, see 1. group function usage rules: Group functions in mysql can be used at will in select statements. However, if a group function exists in the query statement in oracle, other column names must have been processed by g