The DECODE function in Oracle is a versatile and powerful tool that allows users to perform conditional transformations on data within an SQL query. It is similar to the CASE statement, but it offers a more compact syntax, making it a popular choice for simplifying complex queries and improving...
I get the error message “ORA-00939: too many arguments for the function”.The answer is:Yes, the maximum number of components that you can have in a DECODE function is 255. This includes, search and result arguments.SQL tutorial: DECODE function in Oracle DatabaseAbout Enteros...
In Oracle/PLSQL, thedecodefunction has the functionality of an IF-THEN-ELSE statement. The syntax for thedecodefunction is: decode( expression , search , result [, search , result]... [, default] ) expressionis the value to compare. searchis the value that is compared againstexpression. ...
In a DECODE function, Oracle considers two nulls to be equivalent. If expr is null, then Oracle returns the result of the first search that is also null. The maximum number of components in the DECODE function, including expr, searches, results, and default, is 255. See Also: Data Ty...
[Oracle] decode函數使用 ※引述自http://www.techonthenet.com/oracle/functions/decode.php In Oracle/PLSQL, thedecodefunction has the functionality of an IF-THEN-ELSE statement. The syntax for thedecodefunction is: decode( expression , search , result [, search , result]… [, default] )...
∙Oracle 9i, Oracle 10g, Oracle 11g 例如：You could use the decode function in an SQL statement as follows:select supplier_name,decode(supplier_id,1000,'IBM',10001,'Microsoft','1002','Hewlett Packard','Gateway') result from suppliers;上面的sql语句相当于下面的IF-THEN-ELSE :IF supplier_...
The decode function can be used in SQL for and IF-THEN-ELSE construction. It's an alternative for the CASE statement which was introduced in Oracle 8. Syntax: decode( expression , compare_value, return_value, [,compare, return_value] ... [,default_return_value] ) ...
In a DECODE function, Oracle considers two nulls to be equivalent. If expr is null, then Oracle returns the result of the first search that is also null. 但是要注意的是,为这条SQL选择索引,只能对id列创建,不能对decode函数创建,因为Oracle不能基于未知的用户输入创建索...
This tutorial provides a comprehensive guide to using the SQL DECODE() function in Oracle. I will also compare DECODE() to CASE WHEN in Oracle and help you understand when to use each function. Finally, I will provide code for the equivalent transformations in SQL Server, PostgreSQL, and ...
Oracle 9i, Oracle 10g, Oracle 11g 例如: You could use the decode function in an SQL statement as follows: select supplier_name,decode(supplier_id,1000,'IBM',10001,'Microsoft','1002','Hewlett Packard','Gateway') result from suppliers; ...