convert oracle sql to postgresql

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.* fro

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,

Oracle XQuery query, build, and convert XML (1) In Oracle databases 10 G In version 2nd, Oracle introduces a fully functional built-in XQuery Engine Integrated with the database, which can be used to complete various tasks related to the development of XML-Supported Applications. XQuery is a query language used

In the development of the report, many times will encounter row and column conversion operations, the developer for the SQL level row and column conversion operation has been not very understanding, today just time to make some simple summary. Here are 3 ways to implement SQL row and column conversions, including General SQL Solutions and

Many data conversion and processing operations may encounter the need to convert 0.007007040000 to 0.70%. We can use the Oracle SQL function to_char to achieve this conversion. This Many data conversion and processing operations may encounter the need to convert 0.007007040000 to 0.70%. We can use the

+ 000000001 01:30:10. 100000 SQL> However, it is difficult to simply convert the data into a specific precision. It is not feasible to use a method similar to the date type. For example, to score: SQL> select 1440 * (t2-t1) from test; + 000000010 00:02:24. 000000000 + 000001450 00:02:24. 000000000 + 000001530 04:02:24. 000000000

Label:PostgreSQL has a function of generating sequences, which makes it easy to create 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 ms t_girl=# Select * FROM Generate_series (1,10,2); Generate_series-----------------1 3 5 7 9 (5 Line record) Time: 0.4

Many data conversion and processing operations may encounter the need to convert 0.007007040000 to 0.70%. We can use the Oracle SQL function to_char to achieve this conversion. This function is used to convert the DATE or NUMBER data type to a printable string in the format of to_char (number_type, format_mask ). In th

In Oracle, IP addresses and masks are converted to the CIDR format due to the following problems: IP addresses and IP address masks are stored in the database and must be converted to the CIDR format, in addition, it is not only about converting the mask into a number corresponding to the CIDR. You need to convert the original IP address to the corresponding network address. For example, the IP address is 5

21st U+1fffff 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx u+3ffffff " td>111110xx 10xxxxxx 10xxxxxx 10xxxxxx 31 U+7fffffff 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx And 0x00 is in line with UTF8 rules. This makes us very surprised. And then we found that there were two points that confirmed the problem:1,

Oracle. You can convert the IP address and mask to a number through the string-to-IP function, and then obtain the number corresponding to the corresponding network address through bitwise and operation. Then, you can convert the number to a string, the corresponding network address is obtained. For the number of CIDR following/, You can import a table correspon

database slow situation. The general symptom is all pages that involve the database, all of a sudden it's surprisingly slow (5 seconds or even 10 seconds), and pages that involve HTML and pure ASP operations are normal, and then suddenly recover after a period of time (about 10 minutes or more) (my forum sometimes appears to be a problem). This time you can use the general ASP probe test, if the server's operation time is normal, generally is the database aspect problem. Introduction to MS

Convert string to clob in the project /** * Convert string to clob.* @ Author zhaohr* @ Param sort* @ Throws classnotfoundexception* @ Throws sqlexception*/@ Suppresswarnings ("UNUSED ")Public int insertsortwithstr2clob (sort) throws classnotfoundexception, sqlexception {// Todo auto-generated method stubDrivermanager. registerdriver (New oracledriver ());String url = "JDBC:

A very powerful function in Oracle is to convert functions written in Java into functions in Oracle databases. after conversion, we can use it like a common function. because Oracle is developed in Java, it is naturally compatible with Java. let's talk about the specific operation. for example, create a function to gen

row_num fromUser_objectswhereRowNum Ten) T2whereNVL (substr (answer,t2.row_num*2-1,1),'-')!='-' Order byAnswer Note: User_objects mainly describes all the objects that are established by the current user through the DDL. Includes tables, views, indexes, stored procedures, triggers,Packages, indexes, sequences, and so on. is a view of the Oracle dictionary table. This can also be done in other ways, such as dual, where the content bySo don't dual

In oracle, convert columns to the wm_concat function after 10 Gb rows in oracle. Use the test data to create table test (id number, name varchar2 (20); insert into test values (1, 'A'); insert into test values (1, 'B'); insert into test values (1, 'C'); insert into test values (2, 'D'); insert into test values (2, 'E'); www.2cto.com effect 1:

Several Methods to convert a common Oracle table to a partitioned tableThere are four ways to convert a normal table to a Partition table: 1) Export/import method 2) Insert with a subquery method 3) Partition exchange method (SWAP Partition) 4) DBMS_REDEFINITION (online redefinition) Steps for exchanging partitions: 1) create A partition table, assuming there are

Convert String to CLOB in the project/** * Convert String to CLOB.* @ Author ZhaoHr* @ Param sort* @ Throws ClassNotFoundException* @ Throws SQLException*/@ SuppressWarnings ("unused ")Public int insertSortWithStr2CLOB (Sort sort) throws ClassNotFoundException, SQLException {// TODO Auto-generated method stubDriverManager. registerDriver (new OracleDriver ());String url = "jdbc:

Oracle Advanced SQL (4) -- SQL column and column conversion topic 2, oracle -- SQL [Previous topic] column-and-column conversion 1-Introduction to functions of aggregate and unaggregate Implementation case 1001: lufei1001 shanzhi1001 namei1001 qiaoba: 1001 lufei, shanzhi, na

It was freezing, and I stayed at home and read "Mastering Oracle SQL" 2nd. I found that Oracle is still very powerful, and there are two hundred optical functions. It is difficult to simulate the Object-Oriented Query languages, in particular, Windows functions for OLAP in sql2003.Fortunately, hibernate3.0 also supports SQL