- In
SQL,
null or
NULL is a
special marker used to
indicate that a data
value does not
exist in the database.
Introduced by the
creator of the relational...
- department.
These are the
SQL statements to
create the
above tables:
CREATE TABLE department(
DepartmentID INT
PRIMARY KEY NOT
NULL,
DepartmentName VARCHAR(20)...
- concatenation,
NULLs, and
comparison case
sensitivity vary from
vendor to vendor. Postgre
SQL and
Mimer SQL strive for
standards compliance,
though Postgre
SQL does...
- string{
isSqlNullable = yes,
maxLen = 1};
LASTNAME string{
sqlVariableLen = yes,
maxLen = 15}; DEPT string{
column = "WORKDEPT",
isSqlNullable = yes, maxLen...
-
database management system (RDBMS)
emphasizing extensibility and
SQL compliance. Postgre
SQL features transactions with atomicity, consistency, isolation,...
-
Microsoft SQL Server (Structured
Query Language) (often
prounced "sequel") is a
proprietary relational database management system developed by Microsoft...
-
light Null (
SQL) (or
NULL), a
special marker and
keyword in
SQL indicating that a data
value does not exist, is not known, or is missing.
Null character...
- In the
context of
SQL, data
definition or data
description language (DDL) is a
syntax for
creating and
modifying database objects such as tables, indices...
- doesn't
consider SQL nulls and the three-valued
logic they entail; the
logical treatment of
nulls remains mired in controversy. Additionally,
SQL has multiset...
-
anything with
Null directly,
SQL provides two
Null-specific
comparison predicates: IS
NULL and IS NOT
NULL test
whether data is or is not
Null.
SQL does not...
