REQUEST COMPLIMENTARY SQLS*PLUS LICENCE
PostgreSQL tutorial: PostgreSQL data types
Below is a list of data types available in PostgreSQL, which includes string, numeric, and date/time type.
String data types
Below are String data types in PostgreSQL :
| Syntax of data types | Explanation |
|---|---|
| char (size) | Where size is the number of characters to store. A string of fixed lengths. Space is added to the right to the size of the characters. |
| character (size) | Where size is the number of characters to store. A string of fixed lengths. Space is added to the right to the size of the characters. |
| var symbol (size) | Where size is the number of characters to store. A string of variable lengths. |
| character varying(size) | Where size is the number of characters to store. A string of variable lengths. |
| text | The string of variable length. |
Numerical data types
Below are the numeric data types in PostgreSQL:
| Syntax of data types | Explanation |
|---|---|
| bit(size) | Bit string of fixed length, where size is the length of a string of bits. |
| varbit(size) bit varying(size) | Bit string of variable length, where size is the length of a string of bits. |
| smallint | Equivalent to int2. 2-byte integer with a sign. |
| int | Equivalent to int4. 4-byte integer with a sign. |
| integer | Equivalent to int4. 4-byte integer with a sign. |
| bigint | A large integer value, equivalent to int8. An 8-byte integer with a sign. |
| smallserial | A small integer value with auto-increment equivalent to serial2. 2-byte integer with a sign, autoincrement. |
| serial | Auto-incremental integer value, equivalent to serial4. 4-byte integer with a sign, auto-incremental. |
| bigserial | Large auto-incremental integer value equivalent to serial8. 8-byte integer with a sign, auto-incremental. |
| numeric(m,d) | Where m is the total number of digits, and d is the number after the decimal fraction. |
| double precision | 8 bytes, double-precision, floating-point number. |
| real | 4-byte floating-point single-precision number. |
| money | Cost of currency. |
| bool | Logical logical data type – true or false. |
| boolean | Logical logical data type – true or false. |
Date/Time Types of data
Below is the date/time of the data types in PostgreSQL:
| Syntax of data types | Explanation |
|---|---|
| date | Displayed as “YYYY-MM-DD”. |
| timestamp | Displayed as «YYYY-MM-DD HH:MM:SS». |
| timestamp without time zone | Displayed as «YYYY-MM-DD HH:MM:SS». |
| timestamp with time zone | Displayed as «YYYY-MM-DD HH:MM:SS-TZ». Equivalent to the timestamptz. |
| time | Displayed as «HH:MM:SS» without a time zone. |
| time without time zone | Displayed as «HH:MM:SS» without a time zone. |
| time with time zone | Displayed as «HH:MM:SS-TZ» with the time zone. Equivalent to the time zone. |
Understanding Advanced Datatypes in PostgreSQL
MORE NEWS
PreambleNoSql is not a replacement for SQL databases but is a valid alternative for many situations where standard SQL is not the best approach for...
PreambleMongoDB Conditional operators specify a condition to which the value of the document field shall correspond.Comparison Query Operators $eq...
5 Database management trends impacting database administrationIn the realm of database management systems, moreover half (52%) of your competitors feel...
The data type is defined as the type of data that any column or variable can store in MS SQL Server. What is the data type? When you create any table or...
PreambleMS SQL Server is a client-server architecture. MS SQL Server process starts with the client application sending a query.SQL Server accepts,...
First the basics: what is the master/slave?One database server (“master”) responds and can do anything. A lot of other database servers store copies of all...
PreambleAtom Hopper (based on Apache Abdera) for those who may not know is an open-source project sponsored by Rackspace. Today we will figure out how to...
PreambleMongoDB recently introduced its new aggregation structure. This structure provides a simpler solution for calculating aggregated values rather...
FlexibilityOne of the most advertised features of MongoDB is its flexibility. Flexibility, however, is a double-edged sword. More flexibility means more...
PreambleSQLShell is a cross-platform command-line tool for SQL, similar to psql for PostgreSQL or MySQL command-line tool for MySQL.Why use it?If you...
PreambleWriting an application on top of the framework on top of the driver on top of the database is a bit like a game on the phone: you say “insert...
PreambleOracle Coherence is a distributed cache that is functionally comparable with Memcached. In addition to the basic function of the API cache, it...
PreambleIBM pureXML, a proprietary XML database built on a relational mechanism (designed for puns) that offers both relational ( SQL / XML ) and...
What is PostgreSQL array? In PostgreSQL we can define a column as an array of valid data types. The data type can be built-in, custom or enumerated....
PreambleIf you are a Linux sysadmin or developer, there comes a time when you need to manage an Oracle database that can work in your environment.In this...
PreambleStarting with Microsoft SQL Server 2008, by default, the group of local administrators is no longer added to SQL Server administrators during the...