Oracle DECODE() function examples Let’s take some examples of using theDECODE()function to see how it works. A) Use DECODE() function to make data more meaningful See the followinglocationstable in thesample database: The following statements return the country that has at least two locations...
可以使用case条件语句调用存储过程和函数。 DECODE的用法: DECODE(value, search_value, result, default_value) compares value with search_value. If the values are equal, DECODE() returns result, otherwise default_value is returned. DECODE() allows you to perform if-then-else logic in SQL without ...
One of our readers wanted to know how to use the DECODE function to compare two dates (that is: date1 and date2), where date1 > date2, the DECODE function should return date2. Otherwise, the DECODE function should return date1.Answer:To do so, use the DECODE function as follows:DECO...
Oracle DECODE Function With Examples DECOMPOSE Converts the provided value into a string value with separated Unicode characters. DECOMPOSE ( input_string [CANONICAL|COMPATIBILITY] DUMP Returns a value containing the data type, length, and internal representation of a value. DUMP ( expression [, retu...
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] ) ...
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decode(instr(NAME,'a'), 0, NAME, substr(NAME,1,instr(NAME,'a')-1)) FROM xb_b; 3.0.8LPAD和RPAD的用法 表示补充的含义,这两个函数最少需要两个参数,最多需要三个参数,第一个参数是需要处理的字符串,第二个参数是需要将字符串扩充的宽度,第三个参数表示加宽部分用什么字符来做填补,第三个参数的...
Some functions which are similar to the COALESCE function are: NVL– substitutes a value if a NULL value is found DECODE: Translates a value to another value based on certain conditions. CASE: This statement performs IF THEN ELSE functionality in Oracle. ...
To make the output more readable, you can combine theDECODE()function with theGROUPING()function as shown in the following query: SELECTDECODE(GROUPING(customer),1,'ALL customers', customer) customer,DECODE(GROUPING(category),1,'ALL categories',category)category,SUM(sales_amount)FROMcustomer_catego...
select lpad(' ',2*(level-1))||level||'.'||position||' '|| operation||' '|| decode(options, null, null, options || ' ') || object_name plan from xres start with id = 1 connect by prior id = parent_id; Which produces the following plan: ...