what result set

Author: caocao (Web hermit), http://www.caocao.name, http://www.caocao.mobi Reprinted please indicate Source: http://www.javaeye.com/topic/78884 I. OriginLucene's search performance decreases significantly after indexing files on G. It takes 0. x

I have seen some people switch between them before. I was just amazed at the time, and it was over. I didn't remember it until when I used it. I started to look for it everywhere, no trace can be found. Today, I accidentally saw the use of connect

A friend once asked me the following question: how to add a new column (regular) in the query results )? For example, the structure and data in the database are as follows: (tablename: People) Name age Changchang 20 Charles 23 Sunny 21 Huangzhs

Today I did a function of using SQL statements for table-link queries in Hibernate, and the resulting properties are from fields in two tables. The following methods are logged for the result set traversal.The SQL statement is not written. Some of

-- return result set stored procedure --1 package mytestpackage astype test_cursor is ref cursor;end Mytestpackage; --2. Creating a stored procedure CREATE procedure Sp_pro9 ( spno in number, p_cursor out mytestpackage.test_cursor)

Description The 1.PreparedStatement interface inherits statement, and its instance contains compiled SQL statements that execute faster than statement. 2.PreparedStatement inherits all the features of statement, three methods Executeupdate,

The previous reference to the next () method of the resultset result set is not much cared for, often directly while (Rs.next ()) is traversed. If you want to determine whether the RS result set is empty, many people first think that if (rs = null),

JDBC Multiple Table association query, multiple table query returns the result set processing method.This feature is commonly used in two or more table associated queries, and the returned query results are field information from multiple (or two)

one of the toughest problems in MySQL is how to get the first highest value in the result set n , such as querying for the second (or third n ) expensive product, and obviously not using a function like Max or min to query for it. However, we can

Hibernate's control of native SQL query execution is done through the sqlquery interface.Session.createsqlquery (); Use the list () method to process the result set of Session.createsqlquery () to a list and return a list of an Object array (object[]

Oracle Multi-result set nesting loop processing optimization--Poor performancebegin forAinch(SelectId,name,sex,idcard frompeople) Loop forBinch(SelectId,name,sex,idcard from中文版) LoopifA.idcard=B.idcard Then --Do something End if;

1 Public Staticarraylist> query (Connection conn,string SQL, object[] paras)throwsException {2PreparedStatement statement =NULL;3ResultSet SS =NULL;4String str = "";//Play log Use5Arraylist> resultlist =NewArraylist>();6statement

Many of the query class's stored procedures return a result set of a table structure, and if you need to use this result set in other stored procedures, you can use the former query results directly to avoid writing duplicate SQL scripts. For

The error code is as follows:static String u = "user";static String p = "PSW";static String URL = "Jdbc:oracle:thin: @localhost: 1521:db_name";con = drivermanager.getconnection (URL, u, p);statement = Con.createstatement ();String query1= "SELECT *

The problem is as follows:String sqltest = "Select Summary,summaryno from F_summary"; Listthis. GetService (). Getlistbysql (sqltest); for (Map m:listtest) { for (Object k:m.keyset ()) { + ":

JSP page two paging modes:The first: Result set paging, the main code is shown below:Java code ResultSet rs=stmt.executequery (SQL); ResultSetMetaData Md=rs.getmetadata (); Rs.beforefirst (); Rs.absolute (2000); } int ii=0;

Scenario Recurrence:Maintenance people want to use the Plsql Developer tool to view data from a table a year ago, with data in the table about 30W, because there is no business at this time, and the maintainer closes the application. When the query

Yesterday in the project you need to export the query results of the log.The implementation of the log export function is like this, enter the query criteria, and then export the query results. Because of the large amount of log data. Many times,

1 #Introducing the Pymysql module2 ImportPymysql as PM3 4 #Database Connection5db = Pm.connect (host='localhost', user='Root', password="123456", database='Task', charset='UTF8')6 #Creating Cursors7Cur =db.cursor ()8 #setting up SQL statements9sql ='

Oracle 10g obtains the result set of merging values in column B based on the same value in column a. oracle 10g obtains the same value according to Column, obtains the result set that combines values in column B. (Make a and B form a parent-child