整数类型(integer types) 任意精度类型(arbitrary precision numbers) 浮点数类型(floating-point types) 序列类型(serial types) 金额类型(monetary types) 字符类型(character types) 二进制数据类型(binary data types) 日期/时间类型(date/time types) 布尔类型(boolean type) 枚举类型(enumerated types) 几何类型(...
SQL Data Types Numeric规则为SQL numeric类型,包含如下类型:integer【int4】、smallint【int2】、bigint【int8】、real【float4】、double precision【float8】、decimal【numeric】、numeric【numeric】、boolean【bool】。 Numeric: INT_P { $$ = SystemTypeName("int4"); $$->location = @1; } | INTEGER...
PostgreSQL provides several integer data types that help us fulfill our needs, such asINTEGER,SMALLINT, andBIGINT. These data types assist us in storing and manipulating whole numbers. Each data type stores a different range of values and has different storage requirements. You can store integer ...
常用的类型是INTEGER,因为它提供了在范围、存储空间、性能之间的最佳平衡。一般只有取值范围确定不超过SMALLINT的情况下,才会使用SMALLINT类型。而只有在INTEGER的范围不够的时候才使用BIGINT,因为前者相对要快。 除此之外,创建表也可以使用 int2,int4,int8来代表 smallint,integer,bigint。如下示例所示: hrdb=# /*...
数组类型(Array Types):用于存储多个相同类型的值。可以使用[]来表示数组类型,例如integer[]表示整数数组。 JSON类型(JSON Type):用于存储JSON格式的数据。可以使用json或jsonb来表示JSON类型。 几何类型(Geometric Types):用于存储几何图形数据,如点、线、多边形等。常见的几何类型包括point、line、polygon等。 网络地...
AddCREATE SEQUENCE AScommand to create a sequence matching an integer data type (Peter Eisentraut) Allow the specification of a function name without arguments in DDL commands, if it is unique (Peter Eisentraut) Improve speed of VACUUM’s removal of trailing empty heap pages (Claudio Freire, ...
How do I get datatype of specific field from table in postgres ? For example I have the following table, student_details ( stu_id integer, stu_name varchar(30 ), joined_date timestamp ); In this using the field name / or any other way, I need to get the datatype of the specific...
Bit strings are strings of 1's and 0's. They can be used to store or visualize bit masks. There are two SQL bit types: bit(n) and bit varying(n), where n is a positive integer. a字段为定长的类型、b为可变长度。 postgres=# CREATE TABLE test(aBIT(3),b BITVARYING(5));CREATE TA...
regprocedure pg_proc function with argument types sum(int4) regoper pg_operator operator name + regoperator pg_operator operator with argument types *(integer,integer) or -(NONE,integer) regclass pg_class relation name pg_type regtype pg_type data type name integer regconfig pg_ts_config tex...
整型(Integer):用于存储整数值,包括小整数(smallint)、整数(integer)和大整数(bigint)。适用于存储年龄、数量等整数数据。腾讯云提供的云数据库 PostgreSQL 支持整型数据存储,详情请参考腾讯云 PostgreSQL。 浮点型(Floating-Point):用于存储浮点数值,包括单精度浮点数(real)和双精度浮点数(double precision)。适用于存...