"mysql vs postgresql" Code Answer's
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mysql vs postgresql
/*Postgres is an object-relational database, while MySQL is a purely
relational database. This means that Postgres includes features like
table inheritance and function overloading, which can be important
to certain applications. Postgres also adheres more closely to SQL
standards.
Postgres handles concurrency better than MySQL for multiple reasons:
Postgres implements Multiversion Concurrency Control (MVCC) without
read locks Postgres supports parallel query plans that can use multiple
CPUs/cores Postgres can create indexes in a non-blocking way (through
the CREATE INDEX CONCURRENTLY syntax), and it can create partial
indexes (for example, if you have a model with soft deletes, you
can create an index that ignores records marked as deleted)
Postgres is known for protecting data integrity at the transaction
level. This makes it less vulnerable to data corruption.*/
data types mysql vs postgresql
MySQL PostgreSQL SQLite
TINYINT SMALLINT INTEGER
SMALLINT SMALLINT
MEDIUMINT INTEGER
BIGINT BIGINT
BIT BIT INTEGER
_______________________________________________________
TINYINT UNSIGNED SMALLINT INTEGER
SMALLINT UNSIGNED INTEGER
MEDIUMINT UNSIGNED INTEGER
INT UNSIGNED BIGINT
BIGINT UNSIGNED NUMERIC(20)
_______________________________________________________
DOUBLE DOUBLE PRECISION REAL
FLOAT REAL REAL
DECIMAL DECIMAL REAL
NUMERIC NUMERIC REAL
_______________________________________________________
BOOLEAN BOOLEAN INTEGER
_______________________________________________________
DATE DATE TEXT
TIME TIME
DATETIME TIMESTAMP
_______________________________________________________
TIMESTAMP DEFAULT TIMESTAMP DEFAULT TEXT
NOW() NOW()
_______________________________________________________
LONGTEXT TEXT TEXT
MEDIUMTEXT TEXT TEXT
BLOB BYTEA BLOB
VARCHAR VARCHAR TEXT
CHAR CHAR TEXT
_______________________________________________________
columnname INT columnname SERIAL INTEGER PRIMARY
AUTO_INCREMENT KEY AUTOINCREMENT
Source: stackoverflow.com
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