good catch phrase

Try CATCH in SQL The code is as follows Copy Code BEGIN TRANSACTIONBEGIN TRY--YOUR SQLCOMMITEnd TRYBEGIN CATCHROLLBACKEnd CATCH The above code is executed in SQL SERVER 2008. After a try catch is used, the catch is rolled back whenever an exception occurs Each TRY ...

Let's take a look at an example Note that: AddEventListener and attachevent difference in the first argument the former is click the latter is the onclick AddEventListener is running in the element scope where the element is located Attachevent Run in global scope (This=window) Try ... Catch statement Try...catch can test errors in your code. The try section contains the code that needs t

About try catch finally, trycatchfinallyI. try catch finally First, when should we use try/catch and finally? -- If the code executed is known to have exceptions Try {// The Code executed here jumps to catch immediately if an exception occurs .}Catch {// The code here will n

In some cases, multiple exceptions may be caused by a single code snippet. In dealing with this situation, you can define two or more catch clauses, each capturing one type of exception. When an exception is thrown, each catch clause is checked sequentially, and the first clause that matches the exception type is executed. When a catch statement is executed, the

The code examples in many books use try catch in database access functions to mislead beginners. Let's analyze a common function (Some large companies in ChinaCode, negative examples, cannot be imitated), 1 public int updateData(String sql) { 2 int resultRow = 0; 3 try{ 4 Connection con = ... 5 statement = con.createStatement(); 6 resultRow = statement.executeUpdate(sql

In some cases, multiple exceptions may be caused by a single code snippet. In dealing with this situation, you can define two or more catch clauses, each capturing one type of exception. When an exception is thrown, each catch clause is checked sequentially, and the first clause that matches the exception type is executed. When a catch statement is executed, the

Label:Original: http://www.cnblogs.com/yun_shuai/archive/2010/09/20/1831546.html /*1. Minor error (Severity level 0-10): By default, the client program is not sent an error message to continue working. Which means it can't be caught in a catch.2. Medium error (Severity level 11-19): Can be caught (either in T-SQL or in the client program)3. Critical error (Severity level 20-25): SQL Server will force the connection to be turned off. Obviously, it's n

Java has a powerful exception handling mechanism, the recent initial study, the feeling of content is still quite a lot of, hereby to write their own understanding to share with you. First, in Java code, because of the use of the MyEclipse IDE, you can automatically alert users to errors and provide a way to modify them. in many cases, when we call a method, we are prompted that a statement should be wrapped up with a try-catch statement. But has not

Ever since we started thinking about the efficiency and performance of code, there's more and more things to write about, like when should I add Try/catch? Will adding too many try/catch reduce performance? Share Some ideas about the impact of Try/catch on performance today. Let's take a look at three questions: Question one: When a piece of code is surrounded b

C + + try throw catchThese three are used together, Try { Statement list; } Catch(TypeA arg ) { Statement list; } Catch(TypeB arg ) { Statement list; } . . . Catch(Typen arg ) { Statement list; } The throw is placed in a try, and if the throw is executed, the corresponding catch