olap functions

650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/75/97/wKioL1Y9oZiAkspGAAMsRcKYMDs505.jpg "title=" capture. PNG "alt=" Wkiol1y9oziakspgaamsrckymds505.jpg "/>CLI commandShow functions;desc function concat;desc function extended Concat; see example of how a function is usedNVL functionCOALESCE (V1,v2,...) Returns the first non-null value in the parameter, or null if all values are null;Set.cli.print.header=true;WinfuncEmployee Salary Identific

In PHP functions, the parameters of the function is the standard for deciding how to successfully apply a function or to control a function's execution behavior. There are many ways to set up and apply a parameter, and it is the key to learn to declare a function with different parameters, and a function that can successfully invoke various forms of the input function. Described earlier How to Declaration and application of various forms PHP

PHP provides us with a variety of system functions to implement the various functions we need, so how do we implement these functions without using system functions? Here is how several system functions are implemented.First, let's define an array:$arr = Array (1,2,3,4,5,6,

. Note the sequence in parentheses: in order by, desc NULL values are at the top. In ASC, the NULL values are at the end. You can use nulls last and nulls first to control RANK () OVER (order by column_name desc nulls last) partition by grouping order RANK () OVER (partition by month ORD Er by column_name DESC) in this way, it will be divided BY month, that is, the information to be arranged is first grouped BY the value of month, sorted in the group, each GROUP does not interfere with ROLLUP, C

One. Check whether it is a function.function Isfunction (x) {return Object.prototype.toString.call (x) = = = "[Object Function]";};function square (n) {return n*n;};Alert (isfunction (square)); trueI. Functional programming1. Working with arrays using functionsFor example:function fn () {//some code ...}; Elemnets.reduce (FN);2. Higher-order functions--functions of operation functionsFor example:Function no

Php serialization functions serialize () and unserialize () compared with native functions, php serialization Functions Php has a good method of formatting strings and converting them into arrays or objects, that is, serialization.There are two methods to serialize variables. The following example uses the serialize () and unserialize ()

function of its base class. When the program finds the keyword virtual before the virtual function name, it automatically uses it as a dynamic concatenation processing, that is, it dynamically selects the appropriate member function when the program is running. Virtual functions are a manifestation of C ++ polymorphism. Dynamic Association stipulates that virtual functions can only be called by referring t

1. There are two string comparison functions, namely memcmp () and strcmp (),MEMCMP (const char *s,const char *d,int N)Indicates that the string s and D compare the first n characters, and if the character length is less than N, the comparison is out of bounds, so use this function with special care for S and d in length and the number of characters to compare.strcmp (const char *s,const char *d)A parameter n is less than the last function, because th

C language is inseparable from functions, and it is convenient to use functions, but it is costly to use functions; In particular, during repeated calls, the function will waste some time due to repeated pressure stacks and outbound stacks. The following is a test. The time for using a function is 8 seconds and 4 seconds, respectively! 1. Test the cost of