Jan 15, 2016 · NUMBER(12,0) indicates a numeric data type with precision 12 and scale 0 . A related SO post explains precision and scale further:.
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People also ask
What does not null enable mean?
The NOT NULL constraint enforces a column to NOT accept NULL values. This enforces a field to always contain a value, which means that you cannot insert a new record, or update a record without adding a value to this field.
Should I specify not null for a primary key?
When you define a PRIMARY KEY constraint, the database server also silently creates a NOT NULL constraint on the same column, or on the same set of columns that make up the primary key. You cannot specify NULL as the explicit default value for a column if you also specify the NOT NULL constraint.
What is the meaning of number 10 2 in Oracle?
Create a “price” column with a NUMBER(10, 2) data type and set it to NOT NULL, meaning it cannot have a NULL value. Also create a NUMBER datatype, with a precision of 10 and a scale of 2 - it will be used to store values with up to 10 digits with 2 digits after the decimal point.
What is datatype number 12 0 in Oracle?
NUMBER(12,0) indicates a numeric data type with precision 12 and scale 0 . A related SO post explains precision and scale further: Precision is the number of significant digits. Oracle guarantees the portability of numbers with precision ranging from 1 to 38.
Jan 15, 2016
Nov 12, 2021 · A unique key is used to ensure no rows have duplicate values, but it can have null values (unless set to not null). Also, you can have ...
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