When you use. NET connector to connect to the MySQL database and retrieve some data, you may get an error message:"Unable to convert MySQL date/time value to System.DateTime"This is because there are "0000-00-00" data values in the Date column to fix this problem, you can either set the data to null or set "Allow Zero datetime=true" in the connection stringCases:
The requirement is to be sorted according to Pinyin, while the MySQL database uses UTF encoding.
If you use GBK, the collation is phonetic.
and the CONVERT function in MySQL, you can transform the data.
We have a simple performance test for this convert, here are the test procedures and test
Label:The solution is based on the following URL:http://blog.csdn.net/stail111/article/details/5640109Questions: MySQL database, if the date character blank in the database is a value of ' 0000-00-00 00:00:00 ' when queried, return: Cannot convert value ' 0000-00-00 00:00:00 ' from column TIMESTAMPWorkaround:Change the way you connect to a databaseAdd a parameter after the connection: Jdbc:mysql://127.0.0.1
Methods for importing SQL files into PowerDesigner (convert Oracle SQL files to MySQL)The method of importing the database structure of the Xxxxxx.sql file into PowerDesigner is as follows: First step: The table structure of all tables of the library to be imported (no table data, as long as the table structure) is exported as a. sql file.Step two: Find File >> Reverse Engineer >> Database in Powerdesinger,
Use Shell scripts to convert MySQL table data to json format, mysqljson
The script is as follows:
#!/bin/bashmysql -s -phello test >1.log
The data in table t1 is as follows:
mysql> select * from t1;+------+-------+| id | name |+------+-------+| 1 | || 1 | NULL || 2 | hello |+------+-------+3 rows in set (0.00 sec)
The script execution result i
Type mismatch: cannot convert from java. SQL. PreparedStatement to com. mysql. jdbc. PreparedStatement, preparedstatement
Connection. prepareStatement () function error, prompt:
Type mismatch: cannot convert from java. SQL. PreparedStatement to com. mysql. jdbc. PreparedStatement
This is because the imported package
Programmers who write Php+mysql know there is a time difference, UNIX timestamp and format date are two time representations we often deal with, Unix timestamp storage, processing convenient, but not intuitive, format date intuitive, but not as easy to deal with the Unix time stamp so freely, So there are times when you need to convert to each other, and there are several ways to transform each other.
O
access|mysql| Conversion
Access can only be used under Windows This deadly feature makes me sick and determined to convert access to MySQL, but I've found a lot of articles on the Internet that have no direct conversion. I heard that you can use ODBC to turn, just try it.
First installs the MYSQL,MYODBC, constructs a
After 20 rows of statements are converted from Excel to mysql, I have learned a little about php and mysql, I want to secretly "share" this confidential commercial data, while thinking about how to get it, while thinking about how to convert it into a mysql database, I went to many php site forums to ask experts, there
Because the project needs to need so in the Web site, and now summed up a bit, I hope to help you, use the software has mss2sql, before using the software, please install SQLService and MySQL in the local first.Mss2sql:http://files.cnblogs.com/andrew-blog/mss2sql.rarReference: http://www.cnblogs.com/andrew-blog/archive/2011/12/03/SQL_mss2sql.htmlTo open a compressed package after downloadRun Mss2sqlThe default is move to
This is an oracle-defined function. how can we convert it to mysql worker (in_taskIdvarchar2, in_work_novarchar2) returnvarchar2isv_sumnumber (10); -- Average quality inspection completion quantity v_numNUMBER (10 ); -- individual QC completion quantity v_qualitied_cntNUMBER (10); v_resultvarchar2 (20); -- 0 exception, 1 is higher than the average... mysqloracle functions
This is a custom oracle functi
Label:Reprint: http://www.cnblogs.com/angestudy/archive/2012/06/04/2533548.htmlMss2sql:http://files.cnblogs.com/andrew-blog/mss2sql.rarTo open a compressed package after downloadRun Mss2sqlThe default is move to MysQL server directly, select NextGo on, wait a minute.This time it is necessary to connect to MySQL server, I am local, so choose Local, fill in your username and passwordContinue waiting for conne
When the mysql database storage engine is MyISAM, data tables may be locked in the case of large traffic volumes, which may cause users to return 502 when they connect to the website, in this case, you need to convert the MySQL database MyISAM storage engine to Innodb.The procedure is as follows:1,Export the table structure of the CentOS DatabaseCopy codeThe Code
Convert PDM to MYSQl Databases in powerdesigner
Use PowerDesigner to design and build a MySQL database1. Create a database creation script using PowerDesigner1. Design CDM (Conceptual Data Model)2. Select Tools> Generate Physical Data Model, select the corresponding DBMS as MySQL, and Generate PDM3. Select Database->
Use Hibernate to connect to the database of mysql5. Since the table uses a datetime time period, the following
Java. SQL. SQLException: Cannot convert value '2017-00-00 00:00:00 'from column 9 to TIMESTAMP.At com. mysql. jdbc. ResultSet. getTimestampFromBytes (ResultSet. java: 6864)At com. mysql. jdbc. ResultSet. getTimestampInternal (ResultSet. java: 6899)At com
Convert mysqlstr_to_date string to date bitsCN.com
Mysql str_to_date string to date
Mysql built-in functions use str_to_date () in mysql to convert a string to a date.
Instance:
The separators are the same, and the year, month, and day must be the same.
Sele
Tags: innodb default identity nod MySQL code nbsp UTF8 textEngine=innodb auto_increment=2 DEFAULT charset=utf8 Conversion SQL Server
Auto_increment=2, which is the initial value of the auto-increment column = 2,sql Server sets the default through IDENTITY Charset=utf8
Default Charset=utf8 = Utf8sql Server, text.
Specifies the collation of the column Engine=innodb, which is the setting of the MySQL
Convert the timestamp of ubench and MySQL to DateTime
Using System;Using System. Collections. Generic;Using System. Linq;Using System. Text;
Namespace shopex_lele.codesclass{/// /// Convert the unformatted timestamp to the DateTime format/// Class UinxTime{/// /// Convert Unix timestamp to DateTime type time/// /// ///
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