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In relational databases a virtual column is a table column whose value(s) is automatically computed using other columns values, or another deterministic expression. Virtual columns are defined of SQL:2003 as Generated Column, [1] and are only implemented by some DBMSs, like MariaDB, SQL Server, Oracle, PostgreSQL, SQLite and Firebird (database server) (COMPUTED BY syntax).
Low-cardinality column values are typically status flags, Boolean values, or major classifications such as gender. An example of a data table column with low-cardinality would be a CUSTOMER table with a column named NEW_CUSTOMER. This column would contain only two distinct values: Y or N, denoting whether the customer was new or not.
A delimited text file is a text file used to store data, in which each line represents a single book, company, or other thing, and each line has fields separated by the delimiter. [3] Compared to the kind of flat file that uses spaces to force every field to the same width, a delimited file has the advantage of allowing field values of any length.
If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1275 ahead. Let's start with a few hints.
Another Great Lakes snowbelt city made our list. Cold winds have a much longer route, or fetch, to blow over Lake Superior into Marquette than other parts of Michigan's Upper Peninsula.
If you find a home but locked up your savings in a longer-term CD, you’d have to eat an early withdrawal penalty to access the funds — or wait until the CD matures and hope the property you ...
LAMP—Linux Apache MySQL Perl; LAMP—Linux Apache MySQL PHP; LAMP—Linux Apache MySQL Python; LAN—Local Area Network; LBA—Logical Block Addressing; LB—Load Balancer; LCD—Liquid Crystal Display; LCR—Least Cost Routing; LCOS—Liquid Crystal On Silicon; LDAP—Lightweight Directory Access Protocol; LE—Logical Extents; LED—Light ...
Alaska holds the all-time U.S. record. The mercury plummeted to 80 degrees below zero on Jan. 23, 1971, in Prospect Creek, north of Fairbanks.