Updating tinyint columns in oracle

Posted by / 19-Sep-2019 18:06

You have 10 million rows times 4 bytes for each key. Try bumping it up in the session to 42M (a little bigger than 40M) When BKA is used, the value of join_buffer_size defines how large the batch of keys is in each request to the storage engine.The larger the buffer, the more sequential access will be to the right hand table of a join operation, which can significantly improve performance.Using My SQL 5.6 with Inno DB storage engine for most of the tables. I tried inserting data to a My ISAM table row by row and it took 35 minutes.Inno DB buffer pool size is 15 GB and Innodb DB indexes are around 10 GB. I have one big table which contains around 10 millions records. I need to take only 3 values per line out of 10-12 from the file and update it in the database.For example, the following statement inserts an integer value and a character value into a column of type char.When the INSERT statement is run, SQL Server tries to convert 'a' to an integer because the data type precedence indicates that an integer is of a higher type than a character. You can avoid the error by explicitly converting values as appropriate.The Transact-SQL table value constructor allows multiple rows of data to be specified in a single DML statement.The table value constructor can be specified in the VALUES clause of the INSERT statement, in the USING VALUES Introduces the row value expression lists.

If the conversion is not a supported implicit conversion, an error is returned.I get an updated dump file from a remote server every 24 hours. What's the best way to achieve something like this ? Currently Flow is like this: CREATE TABLE `content` ( `hash` char(40) CHARACTER SET ascii NOT NULL DEFAULT '', `title` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `og_name` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `keywords` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `files_count` smallint(5) unsigned NOT NULL DEFAULT '0', `more_files` smallint(5) unsigned NOT NULL DEFAULT '0', `files` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '0', `category` smallint(3) unsigned NOT NULL DEFAULT '600', `size` bigint(19) unsigned NOT NULL DEFAULT '0', `downloaders` int(11) NOT NULL DEFAULT '0', `completed` int(11) NOT NULL DEFAULT '0', `uploaders` int(11) NOT NULL DEFAULT '0', `creation_date` datetime NOT NULL DEFAULT '0000-00-00 ', `upload_date` datetime NOT NULL DEFAULT '0000-00-00 ', `last_updated` datetime NOT NULL DEFAULT '0000-00-00 ', `vote_up` int(11) unsigned NOT NULL DEFAULT '0', `vote_down` int(11) unsigned NOT NULL DEFAULT '0', `comments_count` int(11) NOT NULL DEFAULT '0', `imdb` int(8) unsigned NOT NULL DEFAULT '0', `video_sample` tinyint(1) NOT NULL DEFAULT '0', `video_quality` tinyint(2) NOT NULL DEFAULT '0', `audio_lang` varchar(127) CHARACTER SET ascii NOT NULL DEFAULT '', `subtitle_lang` varchar(127) CHARACTER SET ascii NOT NULL DEFAULT '', `verified` tinyint(1) unsigned NOT NULL DEFAULT '0', `uploader` int(11) unsigned NOT NULL DEFAULT '0', `anonymous` tinyint(1) NOT NULL DEFAULT '0', `enabled` tinyint(1) unsigned NOT NULL DEFAULT '0', `tfile_size` int(11) unsigned NOT NULL DEFAULT '0', `scrape_source` tinyint(1) unsigned NOT NULL DEFAULT '0', `record_num` int(11) unsigned NOT NULL AUTO_INCREMENT, PRIMARY KEY (`record_num`), UNIQUE KEY `hash` (`hash`), KEY `uploaders` (`uploaders`), KEY `tfile_size` (`tfile_size`), KEY `enabled_category_upload_date_verified_` (`enabled`,`category`,`upload_date`,`verified`), KEY `enabled_upload_date_verified_` (`enabled`,`upload_date`,`verified`), KEY `enabled_category_verified_` (`enabled`,`category`,`verified`), KEY `enabled_verified_` (`enabled`,`verified`), KEY `enabled_uploader_` (`enabled`,`uploader`), KEY `anonymous_uploader_` (`anonymous`,`uploader`), KEY `enabled_uploaders_upload_date_` (`enabled`,`uploaders`,`upload_date`), KEY `enabled_verified_category` (`enabled`,`verified`,`category`), KEY `verified_enabled_category` (`verified`,`enabled`,`category`) ) ENGINE=Inno DB AUTO_INCREMENT=7551163 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci ROW_FORMAT=FIXED CREATE TABLE `content_csv_dump_temp` ( `hash` char(40) CHARACTER SET ascii NOT NULL DEFAULT '', `title` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `category_id` int(11) unsigned NOT NULL DEFAULT '0', `uploaders` int(11) unsigned NOT NULL DEFAULT '0', `downloaders` int(11) unsigned NOT NULL DEFAULT '0', `verified` tinyint(1) unsigned NOT NULL DEFAULT '0', PRIMARY KEY (`hash`) ) ENGINE=My ISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci CREATE TABLE example ( `Id` int(11) NOT NULL AUTO_INCREMENT, `Column2` varchar(14) NOT NULL, `Column3` varchar(14) NOT NULL, `Column4` varchar(14) NOT NULL, `Column5` DATE NOT NULL, PRIMARY KEY (`Id`) ) ENGINE=Inno DB select * from example; ---- --------- --------- --------- ------------ | Id | Column2 | Column3 | Column4 | Column5 | ---- --------- --------- --------- ------------ | 1 | | Column2 | Column3 | 0000-00-00 | | 2 | | B | Bar | 0000-00-00 | | 3 | | C | Foo | 0000-00-00 | | 4 | | D | Bar | 0000-00-00 | | 5 | | E | FOObar | 0000-00-00 | ---- --------- --------- --------- ------------ IGNORE just simply ignores the first line which are column headers.After IGNORE, we are specifying the columns (skipping column2), to import, which matches one of the criteria in your question.This frees you to perform line-by-line updates (as you currently do), but with autocommit or more reasonable transaction batches.Specifies a set of row value expressions to be constructed into a table.

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To insert more rows than the limit allows, use one of the following methods: USE Adventure Works2012; GO CREATE TABLE dbo.