In this tutorial, we will learn about different data types that are supported by MySQL. Data types are specified against each column when a table is created and also while updating/altering the table to add a new column to the existing table We will learn about the data types in three dif...
I am in the process of creating a database that holds my company's measurement data. There are three entities that I wish to relate Project Location Measurement Every Project has many Locations, and every Location has many Measurements
attribute promotion and demotion.Row-based replication supports attribute promotion and demotion between smaller data types and larger types. It is also possible to specify whether or not to permit lossy (truncated) or non-lossy conversions of demoted column values, as explained later in this s...
MySQL INT Types As it was mentioned earlier, MySQL supports SQL standard data types INT and SMALLINT. Besides, MySQL supports TINYINT, MEDIUMINT, and BIGINT. What integer data type to choose depends on the data you are going to store in the column. For example, if you are sure that the...
Bug #21159 Optimizer: wrong result after AND with different data types Submitted: 19 Jul 2006 20:25Modified: 13 Sep 2006 2:22 Reporter: Peter Gulutzan Email Updates: Status: Closed Impact on me: None Category: MySQL Server: OptimizerSeverity: S3 (Non-critical) Version: 5.1.12-beta-...
Rationale === In statement-based replication, it is possible to replicate between tables with different definitions since the statement is just executed on the slave. For row-based replication, the raw data is replicated, so it is currently not possible to replicate between columns with different...
(OOM) error if the slave's table structure was not compatible with the master's table structure. Such an incompatible situation could occur if the table on the slave had been manually changed, or when replicating between different MySQL versions that have different data types. This OOM error ...
The right section of the pgAdmin window contains tabs that display database statistics, SQL commands used to create the database, any dependencies, etc. Note: Pay attention to data type when inserting data into the database. Read our article to learn thedifferent data types in MySQL. ...
mariadb-dump is capable of creating backups in multiple formats, be it CSV, XML, or SQL – making it possible for these backups to be imported into another database, if necessary. This includes different versions of MariaDB, MySQL, or even completely different DBMS (if there are no DBMS...
This query takes 0,4 seconds. How can this be? In the last query, when I change the INNER query from GROUP BY customers.customerCountryCode to GROUP BY customers.customerID it also takes around 30 seconds. Anyone knows why? The customerCountryCode data type is varchar(2), the customerID...