db2

数据备份策略： ♣ 完全备份：备份所有数据 ♣ 增量备份：备份上次备份后，所有新产生的数据 ♣ 差异备份：备份完全备份后，所有新产生的数据 完全备份（mysqldump） # mkdir /mydata # mysqldump -uroot -p123456 -A > /mydata/alldb.sql (备份所有) # mysqldump -uroot -p123456 db2 > /mydata/db2.sql （备份db2库） # mysqldump -uroot -p123456 db2 t2 > /mydata/db2_t2.sql （备份db2库的t2表） # mysqldump -uroot -p123456 -B db3 db2 > /mydata/twodb.sql (备份 db3，db2库) 来源： https://www.cnblogs.com/jiang-bokeyuan/p/11792355.html

I have this query in DB2 SELECT * FROM SOMESCHEMA.SOMETABLE WHERE SYSDATE > @A If the SYSDATE is NULL , would it be greater than any value of @A , assuming that @A and SOMESCHEMA.SOMETABLE.SYSDATE is a Date data type? Please help. Thanks in advance. Another predicate that is useful for comparing values that can contain the NULL value is the DISTINCT predicate. Comparing two columns using a normal equal comparison (COL1 = COL2) will be true if both columns contain an equal non-null value. If both columns are null, the result will be false because null is never equal to any other value, not even

I'm looking for the db2 equivalent of T-SQL's: INSERT INTO People (Surname) VALUES ('O''Hara'); Use two apostrophes '' to get a single apostrophe on DB2 too, according to the DB2 Survival Guide . Isn't that working for you? Brabster is correct. You are supposed to escape ' with '' So to insert O'Hara , you will have to write O''Hara Excerpt from: http://www.michael-thomas.com/tech/db2/db2_survival_guide.htm Escape character. To insert a single quote, use 2 single quotes ( '' ). To insert pet's use the following pet''s. Example: insert into MYTABLE (question,answer) values ('What is your pet''s

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am working to connect my spark application to DashDB. Currently, I can load my data just fine. However, I am unable to save a DataFrame to DashDB. Any insight will be helpful. var jdbcSets = sqlContext.read.format("jdbc").options(Map("url" -> url, "driver" -> driver, "dbtable" -> "setsrankval")).load() jdbcSets.registerTempTable("setsOpponentRanked") jdbcSets = jdbcSets.coalesce(10) sqlContext.cacheTable("setsOpponentRanked") However, when I try to save large DataFrames, I get the error: DB2 SQL Error: SQLCODE=-1666, SQLSTATE=42613,

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have already installed IBM DB2 Database Express on Windows 7 Pro. Now, I would like to create my C# code in order to select/insert/update records in DB2 tables. I spend the whole day searching over the internet for links on how to install either OLEDB or ODBC Driver in order to connect to DB2 database. But without success!!! So, i'm wondering if somebody can help me or send me a useful link to download driver. Thank you 回答1: Download: In the webpage: http://www-933.ibm.com/support/fixcentral/legacy/ With parameters "Information Management"

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I get following error message when trying to insert an object in the database: com.ibm.db2.jcc.am.SqlIntegrityConstraintViolationException: DB2 SQL Error: SQLCODE=-407, SQLSTATE=23502, SQLERRMC=TBSPACEID=2, TABLEID=19, COLNO=0, DRIVER=4.15.134 How can I retrieve the table/column name for which the error is thrown? 回答1: Apparently at the package level, DB2 only works with the IDs and not the names. You can find them back using the following query: SELECT C.TABSCHEMA, C.TABNAME, C.COLNAME FROM SYSCAT.TABLES AS T, SYSCAT.COLUMNS AS C WHERE T

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: We are currently using VARCHAR for storing text data in DB2 however we are hitting the problem that length of VARCHAR specified is not the same as length of text because in DB2 VARCHAR length specified is UTF-8 data length which can vary depending on stored text data. For example some texts contain characters from different languages and because of it some texts with 500 characters can't be saved in VARCHAR(500) and etc. Now we are planning to migrate to VARGRAPHIC. I need to know what are limitations of using VARGRAPHIC for storing unicode

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am getting this error below : com.ibm.db2.jcc.am.SqlException: DB2 SQL Error: SQLCODE=-805, SQLSTATE=51002, SQLERRMC=NULLID.SYSLH203 0X5359534C564C3031, DRIVER=3.58.81 in the execution of application after a certain point of time. Not got any fruitful answer on the web. 回答1: This is an indication that the application is running out of resources; possibly due to not closing connections (too many prepared statements or other such poor programming). If you have access to the application, consider making sure the connections are released when

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am getting this JDBC exception. I googled it but the explanation was very abstract. DB2 SQL error: SQLCODE: -206, SQLSTATE: 42703 com.misys.liq.jsqlaccess.adapter.jdbcadapter.util.JDBCAdapterException: com.ibm.db2.jcc.a.SqlException: DB2 SQL error: SQLCODE: -206, SQLSTATE: 42703, 回答1: That only means that an undefined column or parameter name was detected. The errror that DB2 gives should point what that may be: DB2 SQL Error: SQLCODE=-206, SQLSTATE=42703, SQLERRMC=[THE_UNDEFINED_COLUMN_OR_PARAMETER_NAME], DRIVER=4.8.87 Double check your