What is the limit of the field type BIGINT in SQL?

问题

What is the limit of the field type BIGINT in SQL?

is 100000235882380 or 100000466411115 acceptable? (That is ID from facebook)

回答1:

Check the manual of the RDBMS you're using. It may not be the same in all systems.

MySQL:
https://dev.mysql.com/doc/refman/5.7/en/integer-types.html

PostgreSQL:
https://www.postgresql.org/docs/10/static/datatype-numeric.html

SQL Server (Transact-SQL):
https://docs.microsoft.com/en-us/sql/t-sql/data-types/int-bigint-smallint-and-tinyint-transact-sql

DB2:
http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp?topic=/com.ibm.db29.doc.sqlref/db2z_biginteger.htm

回答2:

Yes, according to int, bigint, smallint, and tinyint (Transact-SQL):

bigint -2^63 (-9,223,372,036,854,775,808) to 2^63-1 (9,223,372,036,854,775,807)

回答3:

It depends on the RDBMS. For example, the maxiumum values of a BIGINT are 9223372036854775807 (for signed) or 18446744073709551615 (for un-signed) on MySQL.

See the Numeric Types section of the docs for the full details.

回答4:

Nothing to worry about. BIGINT can store much larger values than the ones you have.

At a minimum up to 9,223,372,036,854,775,807.

来源：https://stackoverflow.com/questions/4408808/what-is-the-limit-of-the-field-type-bigint-in-sql