With AWS DMS, you can seamlessly migrate data between different database platforms, including Oracle and PostgreSQL, while ensuring data type compatibility. Common Oracle and PostgreSQL data types refer to the
Common mistake to avoid:Picking a method before evaluating the realities of your data and applications. Don’t decide based on what sounds easiest; decide based on what’s actually doable. Application migration This is where teams often underestimate the lift. Moving your application to PostgreSQL ...
PostgreSQL Indexes In this tutorial, you will learn how to use PostgreSQL indexes to enhance the data retrieval speed and various index types. PostgreSQL Administration PostgreSQL administration covers common database administrative tasks including role and database management, backup, and restore.Last...
[root@EULER1 global]# pwd/usr/local/pgsql/data/global[root@EULER1 global]# file pg_controlpg_control: data 读取此文件由pg_controldata这个程序实现,此命令基本没有参数,直接运行即可: [root@EULER1 global]# pg_controldatapg_control version number: 1201Catalog version number: 201909212Database system...
Use Cases of PostgreSQL Varchar Data Type The PostgreSQL Varchar data type is commonly used in various scenarios where text data needs to be stored efficiently. Here are some common use cases: Storing Usernames and EmailsVarchar is ideal for storing short text fields like usernames or email addr...
Creating a multicolumn index in PostgreSQL is a common practice when we want to create an index on multiple columns. 在PostgreSQL 中创建多列索引是一种常见的做法,因为我们要在多列上创建索引。 PostgreSQL Index Types The PostgreSQL index facilitates the efficient retrieval of data from the table. Th...
The INTEGER is the most common choice between integer types because it offers the best balance between storage size, range, and performance. The INTEGER type requires 4 bytes storage size that can store numbers in the range of (-2,147,483,648, 2,147,483,647). You can use the INTEGER ...
return esal+nvl(ecommon,0); end; 1. 2. 3. 4. 5. 6. 7. 8. 9. 调用函数 set serveroutput on; declare sal_sum NUMBER; begin sal_sum:=emp_function(7369); dbms_output.put_line('7369的年薪是'||sal_sum); end; 1. 2.
Using Common Table Expressions: Transforming and Analyzing Data in PostgreSQL, Part 2 In the first article in this transforming data series, I discussed how powerful PostgreSQL can be in ingesting and transforming... 08 April 202413 min read ...
An introduction to queries in PostgreSQL A guide to basic syntax of SQL queries as well as some of the more commonly employed functions and operations. Learn more Tutorial Understanding database sharding Learn what sharding is, its main benefits, and a few common sharding methods. Learn more ...