Openedge Data Management: SQL Reference - Product ...

Example
Literals
Literals
• If the maximum number of elements in the target array is greater than the number of
elements in the source array, the assignment of each of the source element values to the
target elements occurs and the rest of the target elements will be assigned values of NULL.
CREATE TABLE TBL (C1 int, C2 int ARRAY[3]);
INSERT into TBL values (1, ’111;222;333’);
UPDATE TBL SET C2 = ’777;888;999’;
Comparison
OpenEdge SQL provides two scalar comparison operators: = and . Two arrays are
comparable if their element data types are mutually comparable. During comparison, the
elements are compared pair-wise in element order. Two arrays are equal if:
• They both have the same number of elements
• Each pair of elements is equal
Two arrays are not equal if:
• They do not have the same number or elements
• At least one pair of elements is not equal
A literal, also called a constant, is a type of expression that specifies a constant value. Generally,
you can specify a literal wherever SQL syntax allows an expression. Some SQL constructs
allow literals but disallow other forms of expressions.
There are three types of literals:
• NUMERIC
• CHARACTER-STRING
• DATE-TIME
The following sections discuss each type of literal.
Numeric literals
A numeric literal is a string of digits that SQL interprets as a decimal number. SQL allows the
string to be in a variety of formats, including scientific notation.
This is the syntax for numeric literals:
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