oracleHelper.ExecuteNonQuery(OracleHelper.ConnectionStringProfile, CommandType.StoredProcedure, "PO_VENDORS_PKG.GetItemDescription", Parms); return Parms[2].Value.ToString().Trim(); } Function: function GetItemDescription(p_item_code in varchar2, p_org_id number) return varchar2 is v_item_desc var...
Both start_position and length need to be a NUMBER datatype, or a datatype that can be implicitly converted to a NUMBER and must resolve to an integer. This means it can be a different data type but needs to be a whole number. The return value of the Oracle SUBSTR function is always...
Example: TRUNC(2.3401, 2)returns 2.34. Date Functions ADD_DAYS date The ADD_DAYS function adds a number of days to a date. The resulting date accords with the calendar. Note:Oracle FastFormula ignores any fractional part of the numbern. ...
RETURN EXPR2 ELSE RETURN EXPR1 DECODE(AA﹐V1﹐R1﹐V2﹐R2...)函数 解释: IF AA=V1 THEN RETURN R1 IF AA=V2 THEN RETURN R2 ..… ELSE RETURN NULL LPAD(char1,n,char2)函数 解释: 字符char1按制定的位数n显示,不足的位数用char2字符串替换左边的空位 字段名之间可以进行算术运算 例如: (字段...
Example DECLARE VAL VARCHAR2(30); BEGIN VAL := HTMLDB_UTIL.GET_ATTRIBUTE ( p_username => 'SCOTT', p_attribute_number => 1); END; GET_CURRENT_USER_ID Function This function returns the numeric user ID of the current user. Syntax HTMLDB_UTIL.GET_CURRENT_USER_ID; RETURN NUMBER; Pa...
Return value TheEXTRACT()function returns the value of the field of the source. Examples A) Extracting fields from DATE values You can extract YEAR, MONTH, and DAY from a DATE value by using theEXTRACT()function. The following example extracts the value of the YEAR field from a DATE value...
Oracle ROW_NUMBER() examples# We’ll use theproductstable from thesample databaseto demonstrate theROW_NUMBER()function. Oracle ROW_NUMBER() simple example# The following statement returns the row number, product name, and list price from theproductstable. The row number values are assigned base...
The return type is also that datatype, unless otherwise noted for an individual function. 分析函数可取0-3个参数。参数可以是任何数字类型或是可以隐式转换为数字类型的数据类型。Oracle根据最高数字优先级别确定函数参数,并且隐式地将需要处理的参数转换为数字类型。函数的返回类型也为数字类型,除非此函数另有...
function to substitute a value for a null. COUNT and REGR_COUNT neverreturn null, but return either a number or zero. For all the remainingaggregate functions, if the data set contains no rows, or contains only rowswith nulls as arguments to the aggregate function, then the function returns...
在Oracle PL/SQL中,CASE表达式(CASE Expression)是一个非常强大且常用的工具,可以用于在SQL或PL/SQL中执行基于条件的操作。CASE表达式类似于IF-THEN-ELSE语句,但使用起来更加灵活,易于阅读和编写。 CASE表达式包含两种形式,一种是简单形式,一种是搜索形式。 下面将分别介绍这两种形式的写法、语法以及使用方法。