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A lookup table, which contains, as keys, the case values and, as values, the part under the case statement. (In some languages, only actual data types are allowed as values in the lookup table. In other languages, it is also possible to assign functions as lookup table values, gaining the same flexibility as a real switch statement.
The DUAL table is a special one-row, one-column table present by default in Oracle and other database installations. In Oracle, the table has a single VARCHAR2(1) column called DUMMY that has a value of 'X'. It is suitable for use in selecting a pseudo column such as SYSDATE or USER.
PL/SQL refers to a class as an "Abstract Data Type" (ADT) or "User Defined Type" (UDT), and defines it as an Oracle SQL data-type as opposed to a PL/SQL user-defined type, allowing its use in both the Oracle SQL Engine and the Oracle PL/SQL engine. The constructor and methods of an Abstract Data Type are written in PL/SQL.
According to PostgreSQL v.9 documentation, an SQL window function "performs a calculation across a set of table rows that are somehow related to the current row", in a way similar to aggregate functions. [7] The name recalls signal processing window functions. A window function call always contains an OVER clause.
There are so many enduring symbols of Christmas: the trimmed tree, stockings hung by the chimney with care, and of course, jolly Ol' Saint Nick.But for Ree Drummond, there's one Christmas ...
President-elect Trump fired off a Saturday post on Truth Social accusing Democrats of paying celebrities to publicly endorse Vice President Harris, including MSNBC host Al Sharpton. “Are the ...
The two extra free throws, both made by Luke Kennard, did the Raptors no favors in what ended up being a 155-126 loss. Toronto's record now stands at 7-24, a game and a half ahead of the ...
statement separators; statement terminators; and; line continuation; A statement separator demarcates the boundary between two separate statements. A statement terminator defines the end of an individual statement. Languages that interpret the end of line to be the end of a statement are called "line-oriented" languages.