假设example_table中有以下数据: value 5 0 -3 执行上述SQL查询后,可能得到的结果如下: valuevalue_status 5 Value is greater than 0 0 Value is equal to 0 -3 Value is less than 0 这样,我们就成功地使用DECODE和SIGN函数在Oracle数据库中实现了对大于0条件的判断。
在数据库编程中,Oracle的DECODE函数是一种非常有用的工具,它允许开发者在SQL查询中基于条件对数据进行转换。然而,在Java等编程语言中,我们并没有内置的DECODE函数。不过,通过一些简单的逻辑判断和映射,我们可以轻松实现类似的功能。 Oracle DECODE函数简介 Oracle的DECODE函数基本语法如下: DECODE(expression, search1, r...
回答: You will need to create a formula that will evaluate to a single number for each one of your ranges. For example: select emp_name,decode(trunc((yrs_of_service+3)/4),0,0.04,1,0.04,0.06) as perc_value from employees; 问题4: decode函数的参数个数有限制吗?我得到一个错误 "ORA-0...
If default is omitted, then Oracle returns null. The arguments can be any of the numeric types (NUMBER, BINARY_FLOAT, or BINARY_DOUBLE) or character types. If expr and search are character data, then Oracle compares them using nonpadded comparison semantics. expr, search, and result can...
应用于: Oracle 8i, Oracle 9i, Oracle 10g, Oracle 11g 例如For example: 如果decimal_places大于number本身的小数位数,返回原数字不会加0. 如:trunc(125.81,3) would return 125.81; 如果decimal_places为负数,那么将指定的位数
应用于:Oracle 8i, Oracle 9i, Oracle 10g, Oracle 11g 例如For example: trunc(125.815) would return 125 trunc(125.815, 0) would return 125 trunc(125.815, 1) would return 125.8 trunc(125.815, 2) would return 125.81 trunc(125.81, 3) would return 125.81 trunc(-125.815, 2) would return -125.8...
在Oracle/PLSQL中, decode 具有和 IF-THEN-ELSE 一样的功能。decode 函数语法如下：decode( expression , search , result [, search , result]... [, default] )expression 要比较的表达式.search 要与expression 比较的字段。.result 如果expression 与search 一样的话，返回该结果。.default 此参数可选，...
Introduction to Oracle DECODE() function The OracleDECODE()function allows you to add the proceduralif-then-elselogic to the query. In the following example, the OracleDECODE()function compares the first argument (1) with the second argument (1). Because they are equal, the function returns ...
Oracle 9i, Oracle 10g, Oracle 11g For example: You could use the decode function in an SQL statement as follows: SELECT supplier_name, The above decode statement is equivalent to the following IF-THEN-ELSE statement: IF supplier_id = 10000 THEN ...
Example of DECODE and NVL functions Based on the Oracle SQL query shown in the diagram, here is the extracted SQL code and the result set: SQL Query: SELECT STATE, DECODE(STATE, 'HI', 'Remote US state', 'AK', 'Continental US state', 'Contiguous US state') LOCATION FROM CUSTOMER; ...