SQL FAQ - Oracle FAQ
COMMIT - save work done SAVEPOINT - identify a point in a transaction to which you can later roll back ROLLBACK - undo the modification I made since the last COMMIT SET TRANSACTION - Change transaction options like isolation level and what rollback segment to use SET ROLE - set the current active roles DML are not auto-commit. If you include the SAMPLE clause within a multi-table or remote query, you will get a parse error or "ORA-30561: SAMPLE option not allowed in statement with multiple table references"
Adding condition statements to the keyword view: For my examples above I have added the conditional statements from the Expert view and we merely looked at their representation in the Keyword view. Firstly, what do Loop and If statements do? Loop Statement: This is a part of programming logic that is used when a particular set of statements have to be executed repeatedly for a particular number or times
Using the AND and OR functions with IF to create compound logical tests from the Course Excel 2013: Advanced Formulas and Functions
Continue to classic layout Stay on new layout Mark video as unwatched Mark all as unwatched Exercise files Access exercise files from a button right under the course name. Lookup and Reference Functions 41m 58s Looking up information with VLOOKUP and HLOOKUP 3m 57s Finding approximate matches with VLOOKUP 7m 27s Finding exact matches with VLOOKUP 4m 47s Nesting lookup functions 4m 11s Using VLOOKUP with large tables 3m 23s Finding table-like information within a function with CHOOSE 3m 34s Locating data with MATCH 4m 35s Retrieving information by location with INDEX 2m 46s Using MATCH and INDEX together 7m 18s 5
The ways of God are mysterious." Affirmation of the consequent This fallacy is an argument of the form "A implies B, B is true, therefore A is true." To understand why it is a fallacy, examine the truth table for implication given earlier. For example: Premise: All fish live in the ocean Premise: Sea otters are fish Conclusion: Therefore sea otters live in the ocean There's one thing you can't do, though: start from true premises, proceed via valid deductive inference, and reach a false conclusion
When the code is run with a value of 18 or less for the user variable, the Output is this: Changing the value of the user variable to 20 gives this: So only one of the IF Statements will Output a print line
User-Defined Identifiers A user-defined identifier is: Composed of characters from the database character set Either ordinary or quoted Tip: Make user-defined identifiers meaningful. Therefore, after the sub-block redeclares the global variable birthdate, it can reference that global variable by qualifying its name with the block label
Learning some good boolean logic techniques will go a long way towards making your queries more efficient, and you won't need to rely on CASE's and other methods of doing conditional logic. Because what I am trying basically is based on a boolean parameter, display the fields where EMP is equal to 'TER' in one case and EMP is not equal to 'TER" in another case
Mullins CASE expressions are often over-looked but can be extremely useful to change very complex query requirements into simpler, and sometimes more efficient SQL statements. It provides a quick way of transforming normalized data structures into the more common denormalized formats that most business users are accustomed to viewing on reports
SQL SERVER: Check if variable is null and then assign statement for Where Clause - Stack Overflow
So if I add another row but wish to specify int of 8 AND also the reference of text similar to 'repeat' I can do that with a reference again back to the 'isnull' of the first variable yet return an entirely different result data type for a different reference to a different field
To complete not only the current loop, but also any enclosing loop, label the enclosing loop and use the label in an EXIT statement as shown in Example 4-18. Figure 4-1 Control Structures Description of the illustration lnpls008.gif The selection structure tests a condition, then executes one sequence of statements instead of another, depending on whether the condition is true or false
perlop - perldoc.perl.org
(See Context and List value constructors in perldata, and Assigning to References in perlref.) Unlike in C, the scalar assignment operator produces a valid lvalue. Although the most common reason to learn this is to unravel labyrinthine regular expressions, because the initial steps of parsing are the same for all quoting operators, they are all discussed together
JavaScript: Conditional Statements
If no matching label is found, the program looks for the optional default clause, and if found, transfers control to that clause, executing the associated statements. For example, you might have a script that checks if Boolean value is true or false, if variable contains number or string value, if an object is empty or populated, or even check type and version of the visitors browser
Though technically append does not refer to the beginning or end of the existing element as the location, by convention, append means to add to the end, just as appendices are at the end of books. Conditional Logic Now that we have results, what do we do with them? We need a way to apply comparison results with conditional logic (the decision-making process)
So what do you do, eat the cake and ruin your diet? Or stick to your diet and let somebody else have that delicious treat? You might even be saying this to yourself: IfI eat the cake Then my diet will be ruined If I don't eat the cake Then I will be on course for a slimmer figure Note the words If and Then in the above sentences. If I eat the cake Then my diet will be ruined Else If I don't eat the cake Then I will be on course for a slimmer figure And that is what conditional Logic is all about - saying what happens if one condition is met, and what happens if the condition is not met
4.1.2 Use the IF-THEN-ELSE Statement In this exercise, you use the IF-THEN-ELSE statement to check how many students are enrolled in course number 25, section 1. Execute the script, and then answer the following questions: What output is printed on the screen (for both dates)? ANSWER: The first output produced for the date is 09-JAN-2008
If-Then and If-Then-Else Conditional Statements in Java
If at anytime the condition is true then the relevant statements are executed and any conditions beneath are not tested to see whether they are true or false. If this condition is true then the statement beneath the if statement is executed - in this case a boolean variable isChild is set to true.The syntax follows the same pattern every time
Conditional Statements in Excel VBA - If...Then...Else Statements (VBA)
To distinguish between a multiple-line syntax and single-line syntax: if in the first line If statement, nothing follows the Then keyword on the same line, it is multiple-line, otherwise single-line. The variable to be evaluated is determined in the first line of "Select Case expression", and then multiple Case statements specify the possible values
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