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Prepend the value in column C1 with the string "text" if the value in column C2 is "a". UPDATE T SET C1 = 'text' || C1 WHERE C2 = 'a' Set the value of column C1 in table T1 to 2, only if the value of column C2 is found in the sublist of values in column C3 in table T2 having the column C4 equal to 0.
It also supports >REPLACE INTO syntax, [6] which first attempts an insert, and if that fails, deletes the row, if exists, and then inserts the new one. There is also an IGNORE clause for the INSERT statement, [ 7 ] which tells the server to ignore "duplicate key" errors and go on (existing rows will not be inserted or updated, but all new rows ...
SQL includes operators and functions for calculating values on stored values. SQL allows the use of expressions in the select list to project data, as in the following example, which returns a list of books that cost more than 100.00 with an additional sales_tax column containing a sales tax figure calculated at 6% of the price.
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...
Here is a small set of examples of O-PL/SQL syntax, extracted from the official documentation [12] and other sources: A simple example of object-oriented PL/SQL [ 13 ] create or replace type base_type as object ( a number , constructor function base_type return self as result , member function func return number , member procedure proc ( n ...
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Download as PDF; Printable version; In other projects ... Pages in category "Articles with example SQL code" ... Text is available under the Creative Commons ...
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