migrate oracle to postgresql

project, summarize the JDBC driver choices for the database you are currently using:(1) SQL Server for 2005 and later, the proposed use of Microsoft's official type 4JDBC driver, for the 2000 version, if the JDK environment is older, you can use the official Microsoft version, if JDK7.0 use Jtds this type 4JDBC driver; (2) Oracle, it is recommended to use the official thin driver for all versions, that is, the type4 JDBC driver;(3)

PostgreSQL has a function of generating sequences, which makes it easy to build data. Here I use Oracle to implement the function of the generate_series function of Pgsql.POSTGRESQL.t_girl=# SELECT * from Generate_series (1,10); Generate_series-----------------1 2 3 4 5 6 7 8 9 10 (10 Row Records) Time: 1.290 mst_girl=# select * from generate_s Eries (1,10,2); Generate_series-----------------1

Both PostgreSQL and Oracle provide statements such as row_number () over () to rank corresponding fields, which is very convenient. MySQL does not provide such a syntax. Recently, due to the increasing demand for migrating data from Oracle to MySQL, such conversion is inevitable. Below I will implement this in MySQL. The table structure I provided this time is a

I believe that you will often encounter this kind of requirement. You can use the id/name of a staff member to obtain a list of all its employees (including non-subordinate employees, it may take a while to implement this function using java, but it would be so easy if you rely on databases to implement this function. Let's take a look at how Postgresql implements such a feature. With recursive r AS (SELECT * FROM t_account WHEREname =#{ accountName

Tags: AC parameter memo factory tor param tis sql loadedMyBatis Run error message appears:May 23, 2018 12:07:22 am org.springframework.jdbc.support.SQLErrorCodesFactory Info: Sqlerrorcodes loaded: [DB2, Derby, H2, HDB, HSQL, Informix, Ms-sql, MySQL, Oracle, PostgreSQL, Sybase]This error is generally caused by an inconsistency between the input parameters of the SQL statement and the database table structure

Label:The Treesoft database management system uses Java development, adopts the stable common Springmvc +jdbc architecture, realizes the maintenance management operation to the Mysql,oracle,postgresql database based on the Web way.Features include: Database display, library table display, table field structure display, SQL statement online editing batch execution, table structure of online design maintenanc

'% 'PostgreSQL: SELECT *, (T. Category Code | | '-' | | T. Invoice number) as number from the account where username ~* ' Baidu ';Find information about all user names in the data table account that contain Baidu and are case-insensitive4. Determine nullOracle: SELECT productname,unitprice* (unitsinstock+NVL(unitsonorder,0)) from ProductsMySQL: SELECT productname,unitprice* (unitsinstock+ifnull(unitsonorder,0)) from ProductsSQL Server: SELECT prod

Createorreplacefunctiondecode (variadicp_decode_listtext[]) returns textas$ $declare -- Get array length (that is, number of arguments) v_leninteger:=array_length (p_decode_ list,1);-- declares the variable v_rettext;begin/** function description that holds the return value: simulates decode functionality in Oracle ( String processing, Other formats can self-convert return values) * parameter description: The format is the same as

PostgreSQL, Oracle, and MySQL use data dictionaries to obtain the table structure. The schema name and table name are required. PostgreSQL:Select a. attname, pg_catalog.format_type (A. atttypid, A. atttypmod) as data_typeFrom pg_catalog.pg_attribute,(Select C. OIDFrom pg_catalog.pg_class CLeft join pg_catalog.pg_namespace nOn n. OID = C. relnamespaceWhere (C. relname) = lower ('cxf ')And (N. nspname) = lowe

Update NBearLite to v1.0.0.6 beta Fully supports SQL Server, Oracle, MySql, and PostgreSql database Stored Procedure Call code generation (C #/VB. NET) and various parameter types such as input, output, and return. Sub Query is supported. Save able/DataRow is supported. See: http://www.cnblogs.com/teddyma/archive/2007/07/20/825384.html Introduction Use nbearlite.querycolumnsgenerator.exe and specify the tar

Comparison of Oracle, mysql, sqlserver, and postgresql statements 1. Paging Oracle:SELECT * FROM (select a. *, rownum rn from (select T. * from sj_receiptinfo t WHERE t. taxno like concat ('%', CONCAT (?, '%') Order by t. id desc) a where rownum Mysql:Select * from tableName where condition limit (current page number * Page capacity-1), page capacity pagesize SqlServer: SELECT w2.n, w1. * from article w1,

Tags: mobile Scott extension GRE PPI-ble mapping imgObjective to introduceA problem with project development now is the need to access the Oracle database from PostgreSQL As a slag-slag ape, a face is crazy. So consulted the company's database on the Daniel Han. Tell me to use ORACLE_FDW can be achieved, but in the implementation of the installation process, still a variety of problems, and trouble Han help

Tags: query data Family Order font RGB strong Mon include 1. Paging Oracle: SELECT * FROM (select A.*, ROWNUM RN from (select t.* to Sj_receiptinfo T WHERE t.taxno like CONCAT ('% ', CONCAT (?, '% ')) ORDER BY t.id Desc) A WHERE ROWNUM ) WHERE RN >? MySQL: SELECT * from TableName whereconditionsLimit( Current page number*page Capacity-1) , page Capacity pagesize SQL Server : Select W2.N, w1.* from article W1, (select TOP 1030 row_number ()

Sequence is a sequence of numbers that the database system automatically increases according to certain rules. This sequence is generally used as the surrogate primary key (because it does not repeat) and has no other meaning. Sequence is the characteristic of database system, some databases have sequence, some have not. For example, Oracle, DB2, PostgreSQL databases have sequence,mysql, SQL Server, Sybase

In a bug change process, the database error, but a look at the back of the console, and did not burst the previous specific database error reasons, butSqlerrorcodes loaded: [DB2, Derby, H2, HSQL, Informix, Ms-sql, MySQL, Oracle, PostgreSQL, Sybase]At the beginning of the thought is where the configuration is wrong, or the configuration of what things, and did not appear specific errors, looking for a long t

When using spring's jdbctemplate to invoke the databaseThe following problems have arisenSqlerrorcodes loaded: [DB2, Derby, H2, HSQL, Informix, Ms-sql, MySQL, Oracle, PostgreSQL, Sybase]This is typically caused by an error in the SQL statementThis is the time to focus on the format of the SQL statement and the length of the fieldYou can first try running on the SQLyog.Exception sqlerrorcodes loaded: [DB2, D

(Ytt_generate_series (1 , 10)); To_char (SY----------2015-12-08 2015-12-07 2015-12-06 2015-12-05 2015-12-04 2015-12-03 2015-12-02 2015-12-01 2015-11-30 10 rows were selected in 2015-11-29. Time used: 00:00:00.01attached code:--Declare result set. Create or replace type Ytt_num is Object (n number); / Create or Replace type numbers_table is table of Ytt_num; / --Function body. --Created by YTT. --2015/12/9 Create or Replace function Ytt_generate_series (f_start_num number : = 1,--Start numbe