It is also possible to set gtid_next to UUID:TAG:NUMBER to set the UUID of a single transaction to an arbitrary value, along with assigning it a custom tag. The assignments of UUID and NUMBER are otherwise unchanged from previous MySQL releases. In either case, the user is responsible ...
A row in one of these tables provides the database object's parent schema, name, and type. Types of objects include schemas, tablespaces, log file groups, and tables. (If the object is a log file group or tablespace, the parent schema is NULL.) In addition, the ndb_sync_excluded_obje...
The Universal Geo Restore feature allows you to restore a source server instance to an alternate region from the Azure supported regions where the Azure Database for MySQL Flexible Server is available. If a large-scale incident in a region results in the unavailability of a database application,...
MySQL 8.0 deliversNOWAITandSKIP LOCKEDalternatives in the SQL locking clause. Normally, when a row is locked due to anUPDATEor aSELECT ... FOR UPDATE, any other transaction will have to wait to access that locked row. In some use cases there is a need to either return immediately if a ...
12 digit unique random number generation in c# / asp.net 2 digits month 2 dimensional ArrayList in VB.NET? 2 minutes before session timeout, warn the user and extend it 2D array - How to check if whole row or column contain same value 302 is sent back to browser when response.redirect...
Azure Database for MySQL Flexible Server now allows triggering an on-demand server backup and exporting it to an Azure storage account (Azure blob storage). The feature is currently in public preview and available only in public cloud regions. Learn more Known Issues While attempting to enable...
MySQL is based on a well-known and most widely used SQL language. It lets you execute queries on Tables, Rows, Columns, and Indexes. MySQL stores data in a collection of Rows and Columns called Tables, also known as Relations. MySQL works well even with a large data set and can support...
mysql>selectcount(*)fromdt2whereslacklike"a%"; +---+ |count(*)| +---+ |4705992| +---+ 1rowinset(51.77sec) Here are the results I’ve got: read_buffer_size impace on scan performance 8200 bytes is the minimum size for read_buffer_size, this is why we start from this value. ...
MySQL seems to pick the first row based on the autoincrementing ID - is there any way I can avoid this? I really want to keep the performance of this query as efficient as possible and would prefer not to use a union. Please help!
, includingLAG (), which calculates the value of an argument from the row lagging the current row within its partition, andNTILE (), which calculates the bucket number of the current row within its partition. Many existingaggregate functionscan also be used as window functions in MySQL 8.0....