postgres case statement

Tags:bms demo conversion berfor loops charoracletput execution --Multiple IF statements ( note: BEGIN END, IF condition then,elsif condition Then,else ... END IF ) begin if FALSE then Dbms_output.put_line (' Execute if statement ... '); elsif 　　True then Dbms_output.put_line (' Execute ELEIF1 statement ... '); elsif 　　TRUE then Dbms_output.put_line (' Execute ELEIF2

Oneexec While Read lineDo? InstructionsDoneMethod TwoCat File|while Read LineDo? InstructionsDoneMethod ThreeWhile Read lineDo? InstructionsDoneUntil syntaxUntil Do? directive:DoneNote: The condition will not be established, the execution of the cycle, the condition is set to stopFor syntax1 for variable name in variable listDo? directive:Done2 for ((EXP1;EXP2;EXP3))Do? directive:DoneDescriptionThe for is followed by 3 expressions, the first is the variable initialization, the second is the ran

$a=5;switch($a){ case 6: echo "\$a is 6"; case 5: echo "\$a is 5"; case 4: echo "\$a is 4";} As in the above example, my understanding is that each time $ A is compared to the value of the case, the output statement is the same, and the non-conformance is the nex

:[email protected])date=$ (Date +%y%m%d)size=$ (DU-SH/ETC)if [-d/tmp/dbback]Thenecho "Date is: $date" >/tmp/dbback/db.txtecho "Size is: $size" >>/tmp/dbback/db.txtCd/tmp/dbbackTAR-ZCF etc_$date.tar.gz/etc db.txt $>/dev/nullRm-rf/tmp/dbback/db.txtElseMkdir/tmp/dbbackecho "Date is: $date" >/tmp/dbback/db.txtecho "Size is: $size" >>/tmp/dbback/db.txtCd/tmp/dbbackTAR-ZCF etc_$date.tar.gz/etc db.txt $>/dev/nullRm-rf/tmp/dbback/db.txtFiExample 2: Determine if Apache is booting#!/bin/bashport=$ (nmap-s

Case statements and case expressions are an important part of plsql Process Control. Although they are easy to use, they are easy to confuse. This article describes the case statement and case expression, and provides a demonstration to better understand the similarities and

PL/SQL daily question: the difference between a CASE statement and a CASE expression: there are many different types of guinea pigs in the world, some of which have identifiable characteristics. For example, the "Abyssinians" skin has a pleated garlands www.2cto.com "Texels" with long curly hair. In contrast, the White Crested Guinea Pig on the header contains a

Case statements and case expressions are an important part of PLSQL Process Control. Although they are easy to use, they are easy to confuse. This article describes the case statement and the case expression, and provides an example This helps you better understand the simil

: ======================== Copy Code code as follows: SH testwhile1.sh 10 9 8 7 6 Instance 2: (Looping through the contents of the file:) Copy Code code as follows: #!/bin/sh While Read Line;doEcho $line;Done Run Result: =================== Copy Code code as follows: SH testwhile2.sh # do don't remove the following line, or various programs# that require network functionality would fail.127.0.0.1 centos5 localhost.l

: Hamburger! "); //} //else if (a = = "2")//{ //Console.WriteLine ("The Product you selected is: Chicken leg!") "); //} //else if (a = = "3")//{ //Console.WriteLine ("The Product you selected is: Chicken rice flower!") "); //} //else if (a = = "4")//{ //Console.WriteLine ("The Product you selected is: Chicken roll! "); //} //Else//{ //Console.WriteLine ("Your input

One, if statementIn PL/SQL, keywords such as if, then, else, elsif, endif are used to perform conditional logicSyntax format:if conditions 1 Then Statement 1elsif conditions 2 Then Statement 2Else Statement 3End If; Example 1: Practice If structureSolution: Note the program in:Second, Case statementSyntax structure:

SQL statement-case when then else end, SQL-case Output the following results based on the preceding table information: The following are the database and table structure data: create table DeptSales(deptID int,SubjMonth int ,sales int ,deptname varchar(50)) insert into deptsales (deptid ,subjmonth,sales) values (1,1,55);insert into deptsales (deptid ,subjmon

Switch Case statement:1 Switch(expression)2 {3 Caseconstant-expression 1:4 {5 statement block 1;6 Break;7 }8 ...9 Caseconstant-expression N:Ten { One statement block N; A Break; - } - default: the { -Statement Block n+1; - } -}Whe

Tags: for statement while statement case statement Shell Yang ShufanThe shell, as a scripting language, also contains other program control structures such as loops, branches, and so on, making it easier to perform more complex and powerful functions.Using the FOR Loop statementAt work, you often encounter a task that

Times, lob pre-read 0 Times.Table ' Ufi8s6u81179717475734 ' . Scan count 1 , Logical read 37 Physical reads 0 Times, pre-read 0 Times, lob logic reads 0 Physical lob reads 0 Times, lob pre-read 0 Times.Table ' Ufi2j0n11179717502375 ' . Scan count 1 , Logical read 46 Physical reads 0 Times, pre-read 0 Times, lob logic reads 0 Physical lob reads 0 Times, lob pre-read 0 Times. Table found hereUft3a6h61176948132312 has near

An SQL statement is used in the project, such: Select sum (price * xiaoliang)/sum (xiaoliang) price from ...... When sum (xiaoliang) = 0, the error of division by 0 will occur. What should I do? At first, I wantProgramProcessing, that is, moving the computing process to the program is obviously troublesome. Later, I found the method of using the case statement

Select Case StatementExecutes one of several sets of statements based on the value of an expression. Select Case testexpression[Case Expressionlist-n[Statements-n]] . . .[Case Else Expressionlist-n[Elsestatements-n]]End Select ParametersTestexpression An arbitrary numeric or string expression. Expressionlist-n An

you can successfully list, it is considered anonymous FTP is turned on, otherwise considered off.(2) Assign a value to the variable target by filtering out all IP addresses in the/etc/ethers file via the awk command.(3) Use the FOR Loop statement, read the IP address in the target variable, and repeatedly probe the FTP open situation.The script is as follows:[Email protected] ~]# VI scanhost.sh#!/bin/bashtarget=$ (awk ' {print '} '/etc/ethers)echo "T

Switch case is a qualified data in js, which is much simpler than if else. Next I will introduce my understanding of js switch case. In the if Condition Statement, only one logical condition can exist. if multiple conditions exist, you can use nested if statements to solve the problem. However, this method increases the complexity of the program, reduce program r

SQL statement case when then else end returns a qualified value, sqlcase Case has two formats Simple Case functions and Case search functions: -- Simple Case function CASE sex WHEN '1'

5.1 Case Statement1. The case statement has the following structureCase SELECTORWhen EXPRESSION 1 then STATEMENT 1;When Expresssion 2 then STATEMENT 2;........When EXPRESSION n then STATEMENT N;ELSE