如果插入的数值大于(precision-scale)的平方值,会报错如果插入的数值的小数位数多余scale,则会四舍五入。 numeric物理存储上类似于varchar(n),每4个十进制数字2个bytes,再加上5到8个bytes的额外开销。 3.浮点类型(非精确的数值类型) real和double precision不适合做精确的存储和计算。太大或太小的数字都会
double:【不精确类型】【定长类型】PG10:十五位有效数字,会四舍五入(PG14十七位有效数字) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 create tablef2(a double precision);insert into f2values(123456789.123456789);insert into f2values(1.1234567890123456789);insert into f2values(12345678901234567890.123456...
double precision floating-point number (8 bytes):双精度8字节浮点数 inet ipv4 or ipv6 host address integer int integer int, int4 signed four-byte integer:有符号4字节整数【一般意义上的整数】 inteval interval [ fields ] [ (p) ] time span:时间间隔值 line infinite line on a pla...
double precision, integer, interval, numeric, decimal, real, smallint, time (with or without time zone), timestamp (with or without time zone), xml. SQL指定以下类型(或其拼写):bigint、bit、bit variation、boolean、char、character
PreviousPostgreSQL Character Types: CHAR, VARCHAR, and TEXT NextPostgreSQL DOUBLE PRECISION Data Type Last updated on April 18, 2024 Was this page helpful? YesNo On this page Introduction to PostgreSQL NUMERIC data type NUMERIC, DECIMAL, and DEC types Special values PostgreSQL NUMERIC data type ...
非常详细: FE=> Bind(stmt=null,portal=null,$1=<('48.1'::double precision)>,type=FLOAT8) 三月31, 2024 3:49:55 下午 org.postgresql.core.v3.QueryExecutorImpl sendDescribePortal 非常详细: FE=> Describe(portal=null) 三月31, 2024 3:49:55 下午 org.postgresql.core.v3.QueryExecutorImpl send...
double precision float8 double precision floating-point number (8 bytes):双精度8字节浮点数 inet ipv4 or ipv6 host address integer int integer int, int4 signed four-byte integer:有符号4字节整数【一般意义上的整数】 inteval interval [ fields ] [ (p) ] time span:时间间隔值 li...
DOUBLE PRECISIONDOUBLEDouble precision floating-point number CHARCHARFixed-length character string VARCHARVARCHARVariable-length character string with a user-defined limit DATEDATECalendar date (year, month, day) TIMETIMETime (without time zone)
decimal, double precision, numeric, real The precision (p) and scale (s) specified in ArcGIS can affect the resultant data type created in the database. See ArcGIS field data types for more information. Geometry ST_Geometry, Geometry (PostGIS), Geography (PostGIS) In a geodatabase, the ...
创建数据表的同时,会创建同名的type,如 -- 相当于同时执行了CREATE TYPE complex AS (r double precision, i double precision); CREATE TABLE complex (r double precision, i double precision); CREATE TABLE my_complex (name text, value complex); INSERT INTO my_complex (name, value) VALUES ('one'...