scholl inserts

Project Environment:Jsp+servlet+mysql DatabasePlaces to check:1. The overall Java Project encoding format is utf-8. And before the data is passed to the database, whether the data is still normal (and can be traced in a way that breaks the point). If there is a problem at this point, then the place to check is: each jsp/ Whether the encoding format of the Java file is Utf-8, and whether the encoding format is set when the parameter is accepted and the response is received:Request.setcharacterenc

The problem, because the UTF-8 encoding could be two, three, four bytes. Emoji emoticons or some special characters are 4 bytes, and MySQL UTF8 encode up to 3 bytes, so data is not plugged in.That's my solution.1. Locate the My.ini in the MySQL installation directory and make the following changes:[Mysqld]Character-set-server=utf8mb4[MySQL]Default-character-set=utf8mb4Restart MySQL after modification2. Convert the already built tables to UTF8MB4Command:Change database encoding: Alter DB caitu99

This problem, really is looking for a long time.I thought there was a problem with MySQL's timezone. According to the method on the net, change the timezone, still do not work.And then thought it was the Java problem, but try to go to Java also does not exist timezone wrong problem.Finally, it is the MySQL connection string problem, the connection string more than one? SERVERTIMEZONE=UTC. It was this thing that got me through the night.I hereby record it.Java

1999, as long as 998, yes, as long as 998 - begin - Set @n=@n+1 - if @n%2=1--Odd Rows - begin in Set @name=@name1+Convert(varchar,@n)--combination of name and number to avoid duplicate Name column - Set @addre=@name+@addre--address by the name of the "home" combination to avoid different to Set @sql='INSERT INTO Table_test (Id,name,address,gender) VALUES ('+Convert(int,@n)+','+@name+','+@addre+',"'male"')' + Set @addre=''s Home'--because @address has

Configure the Environment:Include:mysql.h fileLib:libmysql.lib fileDll:;libmysql.dll fileConnection code:MYSQL M_sqlcon;Mysql_res *m_res;Mysql_row ROW;Initializing the databaseMysql_init (m_sqlcon);Setting the connection database stringCString Conn_ip,conn_port,conn_dbname,conn_user,conn_password;if (!mysql_real_connect (m_sqlcon,conn_ip,conn_user,conn_password,conn_dbname,int_port,null,0)){AfxMessageBox (_t ("Failed to Access database!"));Return}mysql_query (m_sqlcon, "SET NAMES ' GB2312 '");//

Label:Run the following script to build the test database and table.--Create databasecreate database bulktestdb;gouse bulktestdb;go--int primary KEY, UserName nvarchar (+), Pwd varchar (+)) Go--int, UserName nvarchar (+), Pwd varchar (+))View CodeUse the simplest INSERT statement to iterate through the 1 million data.Select COUNT(*) frombulktesttable;--Delete from bulktesttable;DECLARE @id INT,@username NVARCHAR( +),@pwd varchar( -)SET @id=1SET @username ='KK'SET @pwd='123' while @id1000000 -

Just like when you commit the log, the system will record the time of the commit, if you want to insert data in the table created under Sqlite3, the time point of inserting data is stored in the SQLite database how to deal with it? Create a database, such as Foo.dbCreate a table in this list:CREATE TABLE time ([ID] INTEGER PRIMARY Key,[idcardno] VARCHAR ([createdtime] TimeStamp not NULL DEFAULT current_timest AMP);Insert data:INSERT into time ([Idcardno]) VALUES (' AAA ');View:SELECT * from time

There are two ways of doing this, mainly looking at demand.Method 1: Define the fields and types of the staging table, insert the corresponding valuesCREATE TABLE #Tmp--Create a temporary table #tmp (city varchar ( -), --Country varchar ( -), --); Insert #TmpSelect 'Beijing','China'UnionSelect 'Tokyo','Japan'UnionSelect 'New York','United States' Select* from#Tmp;Method 2: Insert the queried table data directly into the staging tableifOBJECT_ID ('tempdb: #temp') isNotNULLdrop table #tempSelec

", database name. dbo. Table name)--Import Example:SELECT * Into table from OPENROWSET (' SQLOLEDB ', ' SQL Server name '; User name '; ' Password ", database name. dbo. Table name)How do I set it up in Enterprise Manager?SQL Instance---> Security---> Linked server---> Right-click New Linked server General Enter the name of the linked server, select other data sources, select SQLOLEDB, Data source write, general IP address re-select Security-----"SELECT Local login----" The analog tick is made

Tags: blog io os ar data div on log codeUsing Python to insert Chinese data into MySQL error, the original code snippet:1 db = MySQLdb.connect ("localhost", "root", "123", "TESTDB") 2 cursor = db.cursor () 3 sql = "INSERT into AAAA (BB,CC) VALUES (% S,%s) ' 4 5 data = ("Shandong", "Weihai") 6 Cursor.execute (Sql,data) 7 8 Conn.commit () 9 conn.close ()To run the prompt:Unicodeencodeerror: ' latin-1 ' codec can ' t encode character U ' \u674e ' in position 0:ordinal not in range (256)Solution:db

Tags: style blog color os ar sp Data div onThis is going to be a very short very short blog post, the reason why this blog post is mainly to spit groove, express my anger.I am a person know, coding problems encountered is how disgusting, is very disgusting is disgusting very disgusting is, right. In Python, after import mysqldb, the problem of inserting Chinese characters into the database is not encountered at one time. OK, just when I'm stupid, I'm stupid. Once upon a while, Python side Sipila

(3, 0, "name num"),//4 column 1 rowWs.addcell (LAID);Ws.addcell (Laname);Ws.addcell (Lasex);Ws.addcell (Lanum);for (int i=0;iLabel labelid_i= New label (0, I+1, Stus.get (i). GetId () + "");Label Labelname_i=new label (1,i+1,stus.get (i). GetName () + "");Label labelsex_i= new Label (2, I+1, Stus.get (i). Getsex ());Label labelnum_i= new Label (3, I+1, Stus.get (i). Getnum () + "");Ws.addcell (labelid_i);Ws.addcell (labelname_i);Ws.addcell (labelsex_i);Ws.addcell (labelnum_i);}Rb.write ();//wri

Tags: oracle timestamp to_timestampTable structure:CREATE TABLE TEST ( ID INTEGER, BIRTHDAY TIMESTAMP);inserting dates into the timestamp type field using JDBCImport Java.sql.connection;import Java.sql.drivermanager;import Java.sql.preparedstatement;import Java.sql.sqlexception;import Java.text.simpledateformat;import Java.util.date;public class Test {static {try { Class.forName ("Oracle.jdbc.driver.OracleDriver");} catch (ClassNotFoundException e) {e.printstacktrace ();}} /** * Get Conn

. connectionstring=con; con1. Open ();//Opening Database Stringsql= "Insert intoFileuploaded (Fileid,filename,filepath,qrcodepath,filesuffix) values (' "+filenamesave + "', '" "+filename+" ', ' "+filepath+" ', ' "+filepath+" ', ' "+filesuffix+" ');//CREATE statement insert data into database sqlcommandcmd=con1. CreateCommand ();//CREATE DATABASE command cmd.commandtext=sql; cmd. ExecuteNonQuery ();This article is from the "Secrets of Technology-Liu Congcong creation" blog, make sure to kee

) {try {Rs.close ();} catch (SQLException e) {E.printstacktrace ();}}if (statement! = NULL)try {Statement.close ();} catch (Exception E2) {E2.printstacktrace ();}IF (conn! = null)try {Conn.close ();} catch (Exception E2) {E2.printstacktrace ();}}/** Close Statement and Connection * *public static void Release (Statement Statement, Connection conn) {if (statement! = NULL)try {Statement.close ();} catch (Exception E2) {E2.printstacktrace ();}IF (conn! = null)try {Conn.close ();} catch (Exception E

Label:1.INSERT into SELECT statement The statement form is: Insert into Table2 (field1,field2,...) Select Value1,value2,... from Table1 [where column =value] [] for optional content Requires that the target table Table2 must exist, because the target table Table2 already exists, so we can insert a constant in addition to inserting the field Table1 the source table. Examples are as follows: insert into TJJRMX (Yybh,xh,tjxmbh,jg,sfyx,zhxmbh,tjksbh,jcrq,jcys,ts,ckfw,disporder) Select ' $ ', Xh,tjxm

INSERT into table name (Field 1, Field 2, Field 3) values (array 1 data, array 1 data, array 1 data), (array 2 data, array 2 data, array 2 data), (array 3 data, array 3 data, array 3 data), (array 4 data, array 4 data, array 4 data) ;such as: INSERT into tables (groupname,attribute,value) VALUES (' A1 ', ' B1 ', ' C1 '), (' A2 ', ' B2 ', ' C2 '), (' A3 ', ' B3 ', ' C3 '), (' A4 ', ' B4 ', ' C4 ');This article from "All this is not difficult" blog, declined reprint!MySQL

Tags: des style blog http io color ar using SPIn the course of doing the project today, I encountered a problem with the title, such as:The database uses the SQL Server2012 version, and the script to create the table is as follows:CREATE TABLE [dbo]. [Type]([TypeId] INT not NULL PRIMARY KEY,[TypeName] NVARCHAR (+) Not NULL,[Description] NVARCHAR (255) Null[CategoryId] INT not NULL DEFAULT 0)Depending on the solution mentioned in the relevant documentation, a field containing Chinese data is gene

Original: SQL Server garbled after inserting Chinese dataIn the course of doing the project today, I encountered a problem with the title, such as:The database uses the SQL Server2012 version, and the script to create the table is as follows:CREATE TABLE [dbo]. [Type]([TypeId] INT not NULL PRIMARY KEY,[TypeName] NVARCHAR (+) Not NULL,[Description] NVARCHAR (255) Null[CategoryId] INT not NULL DEFAULT 0) Depending on the solution mentioned in some related documents, a field containing Chinese data

Tags: style SP on data BS code as size databaseSometimes when inserting data with Oracle's database, you need to determine if the data already exists.Our first idea is as follows: first execute the following SQL.Select COUNT (*) isexists from t_test_lll;Then determine if isexists equals 0 or not, and if it equals 0, insert is executed.The above write, also can, but write a lot of code, not conducive to post-maintenance.In fact, Oracle can be built into the INSERT statement to judge, the followin