查询 DECIMAL 列的精度和小数位数

Question

我想找到数据类型为 DECIMAL 的列的 numeric_precision 和 numeric_scale。

我试过了

SELECT DATA_TYPE, COLUMN_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'X'

但这只给我 "decimal"

Answer 1

您可以查询系统视图information_schema.columns。我认为您正在寻找列 numeric_precision 和 numeric_scale

select numeric_precision, numeric_scale
from information_schema.columns
where table_schema = ? and table_name = ? and column_name = ?

Demo on DB Fiddle:

create table t (col decimal(10, 2));

select numeric_precision, numeric_scale
from information_schema.columns
where table_schema = 'dbo' and table_name = 't' and column_name = 'col'

numeric_precision | numeric_scale
:---------------- | ------------:
10                |             2

查询 DECIMAL 列的精度和小数位数

Query the Precision and Scale of a DECIMAL column

sql

sql-server

tsql

select

information-schema