tsql nullif

Tags: data format network operation place GPU save good alt margin DataframePowerful features of Python and SQL Server 2017 Python is a new version of SQL Server 2017. Its main purpose is to allow Python-based machine learning in SQL Server, but it can use much more than that, as well as any Python libraries or frameworks. To provide a possible example, Hitendra shows how to safely use this feature to provide a smart application cache, where SQL Server can automatically display when a data chang

"00000", transac_date position () Date (8) "yyyymmdd" terminated by ',', transac_address position (10) char terminated by ',', out_amount decimal external terminated by ', 'nullif out_amount = blks, in_amount decimal external terminated by', 'nullif in_amount = blks, balance decimal external terminated ', 'nullif balance = blanks, opposite_number char terminated

The return value of expr2 or expr3 is a floating point value.Floating Point The return value of expr2 or expr3 is an integer.Integer If both expr2 and expr3 are strings, and any one of them is case sensitive, the returned result is case sensitive. Ifnull (expr1, expr2)If expr1 is not null, the returned value of ifnull () is expr1; otherwise, the returned value is expr2. The returned value of ifnull () is a number or string, depending on the context in which it is used. Mysql> select ifnull (1,

,Prompts the user to check the service name and exits the scriptIf the service is running, output "service name is running"Start the service if the service is not runningMethod 1: Use read to write the script#!/bin/bashRead-p "Please enter your service name:"if [$service! = ' Crond ' a $service! = ' httpd ' a $service! = ' sshd '-a $service! = ' mysqld '-a $service! = ' vsftpd '];th Enecho "Can only check ' vsftpd,httpd,crond,mysqld,sshd"Exit 5FiService $service Status >/dev/

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encrypted value. Compared with the above AES_ENCRYPT and AES_DECRYPT functions, these two functions are relatively weak in encryption. (3) the ENCRYPT function uses the UNIX crypt () system to encrypt the string, ENCRYPT (str, salt) the function receives the string to be encrypted and the salt used for the encryption process (a string that can identify a unique password ). Unavailable on Windows. (4) PASSWORD function format: password (str) returns the string str encrypted PASSWORD string, suit

end of this double-ended queue (linked list) E GetFirst () Gets, but does not remove the first element of this double-ended queue (linked list) E GetLast () Gets but does not remove the last element of this double-ended queue (linked list) E Removefirst () Gets and removes the first element of this double-ended queue. (Linked list) E Removelast () Gets and removes the last element of this double-ended queue. (Linked lis

EXPR2The value of Expr1 is false, and the return value is EXPR3 As follows: SELECT IF(TRUE,1+1,1+2); - 2 SELECT IF(FALSE,1+1,1+2); - 3 SELECT IF(STRCMP ("111","222" )," unequal "," equal "); -Not equal So what's the use of this IF? As an example:Find a book priced at 50, if it is a Java book, it should be marked as sold out So how do you write the corresponding SQL statement? Select *,if(book_name='java',' sold out ', ' In stock ' as from where = - Ifnull-expressionIfnull (EX

: Mysql> select IF (1> 2, 2, 3 );-> 3Mysql> select IF (1 -> YesMysql> select IF (strcmp (test, test1), yes, no );-> No Expr1 is calculated as an integer, which means that if you are testing a floating point or string value, you should use a comparison operation. The Code is as follows: Mysql> select IF (0.1 );-> 0Mysql> select IF (0.1 -> 1 In the first case above, IF (0.1) returns 0, because 0.1 is converted to an integer, resulting in t

#!/bin/bash#chkconfig:355525#description:sourcetomcatserver# processname:tomcatexportjre_home=/usr/local/jdkexportjava_bin=/usr/local/jdk/binexport path= $JRE _home/bin: $PATHexport classpath=.: $JRE _home/lib/dt.jar: $JRE _home/lib/tools.jarexport Jre_homejava_binpathclasspathstart () {netstat-tulnp|grep:8080 >/dev/nullif[$?-eq0];thenecho-etomcat8080 Port started: " \033[31m[prohibit start] \033[0m "elsesu -mwww-c/usr/local/tomcat/bin/startup.sh>/dev

+ ' ) ' , '''''' ) + ' ) ' + Quotename ( Isnull ( Nullif (M. R + ( @ Rows - N. R) + (M. R - 1 ) * 1 ) % @ Cols ,0 ), @ Cols )) From Cte_n m Outer Apply ( Select Stuff (( Select ' * ' + Rtrim (I. R) From Cte_n I Where I. R Isnull (( Nullif (N. R - 1 , 0 )), 1 ) For XML Path ( '' )), 1 , 1 , '' ) As V) F1 Outer Apply ( Select Stuff (( Select ' * ' + Rtrim (I. R) From Cte_n

', 'key'), 'key '); SELECT MD5 ('200 '); Select sha ('123 '); Vi. Control Flow Functions MySQL has four functions used for conditional operations. These functions can implement the SQL conditional logic and allow developers to convert some application business logic to the database background. 　　 MySQL control flow Functions: Case when [test1] THEN [result1]... ELSE [default] END if testN is true, resultN is returned; otherwise, default is returned. CASE [test] WHEN [val1] THEN [result]... ELS

'); Vi. Control Flow Functions MySQL has four functions used for conditional operations. These functions can implement the SQL conditional logic and allow developers to convert some application business logic to the database background. MySQL control flow functions: Case when [test1] THEN [result1]... ELSE [default] END if testN is true, resultN is returned; otherwise, default is returned. CASE [test] WHEN [val1] THEN [result]... ELSE [default] END if test and valN are equal, resultN is retur

function is generally only used in the general ledger and asset module of the finance module. B) SQL * LoaderSQL * loader is a tool for directly inserting external data files into database tables. It is very fast and only requires a small amount of programming to import data, it contains three parts: data files, control files, and command syntax.Command example: sqlldr userid = internal/Oracle control = test. CTL Splldr is a command prompt. Enter the database access username and password after

Server-side#!/bin/bashfunction Nginx_install () {if [[-f/usr/sbin/nginx]]; Thenecho ' Nginx has been installed. ' Exitelseflag1=3while [[$flag 1-GT 0]]; Doyum Install epel-release-y yum install nginx-yif [[$?-ne 0]]; Then ((flag1--)) Elseecho ' Nginx had been installed. ' Exitfidoneecho ' Nginx install failed. ' Fisystemctl start Nginx}function nginx_balancer () {msg1= ' upstream MyApp1 {server 192.168.60.129; server 192.168.60.130; Server 192.168.60.131; } ' msg2= ' Proxy_pass http://myapp1; '

This is a point to text will display text small hint Oh, it is called tips box function Point (x,y) {this.x=x; this.y=y}var mloc = new Point (0,0);Document.onmousemove = MouseMove;function MouseMove (EV) {EV = EV | | window.event;var mousepos = mousecoords (EV);mloc.x = mousepos.x;Mloc.y = Mousepos.y;}function Mousecoords (EV) {if (Ev.pagex | | ev.pagey) {return {x:ev.pagex, y:ev.pagey};}return {X:ev.clientx + document.body.scrollleft-document.body.clientleft,Y:ev.clienty + document.body.scroll

' APPEND into TABLE t_car_temp FIELDS terminated by "," (Phoneno,vip_car) Import data directly in the control file 1, the control document TEST.CTL content --The format for executing this file and SQL Loader is: --Sqlldr control= --version of SQL LOADER and the filename for this file. LOAD DATA INFILE * Badfile ' C:\Documents and settings\jackey\ desktop \wmcountry. Bad ' Discardfile ' C:\Documents and settings\jackey\ desktop \wmcountry. DSC ' INSERT into TABLE emccountry Fields

employee is in. You can have a searched case statement can have many different when clauses, and so you can apply many the criteria in T Hose clauses to get the answers for you need. Nullif and COALESCETo further comply with SQL 1999, the NULLIF and coalesce statements have been to added. The NULLIF statement is very simple. It takes two arguments. If they are e

=========== Use of 1.[] When the table that we are looking for is a system keyword or the table name contains spaces, you need to enclose it in [], for example, two new tables, User,user info, then select * FROM User and select * from user info will be error- Need to write: SELECT * from [user] and select * FROM [user info], but do not because there is [] the help of the arbitrary name, it is asking for trouble, but I do see someone named User table for users. 2.

Label:In the previous article, we introduced the most important file in Sql*loader-control file, and this article to introduce the most important part of the control file-the field list, the role of the field list is to the data file records and tables in the database corresponding to the column, here is an example of the field list, In this article we will explain what they mean. . . . 1 (HireDate Sysdate, 2 deptno POSITION (1:2) INTEGER EXTERNAL (2)