Mysql End If :: medcyber.com
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END IF blocks may be nested within other flow-control constructs, including other IF statements. Each IF must be terminated by its own END IF followed by a semicolon. You can use indentation to make nested flow-control blocks more easily readable by humans although this is not required by MySQL. This MySQL tutorial explains how to use the IF-THEN-ELSE statement in MySQL with syntax and examples. In MySQL, the IF-THEN-ELSE statement is used to execute code when a condition is TRUE, or execute different code if the condition evaluates to FALSE.

Summary: in this tutorial, you will learn how to use MySQL IF statement to execute a block of SQL code based on a specified condition. Note that MySQL has an IF function that is different from the IF statement described in this tutorial. The IF statement has three forms: simple IF-THEN statement, IF-THEN-ELSE statement, and IF-THEN-ELSEIF- ELSE statement. MySQL 5.7 Reference Manual /. END IF blocks may be nested within other flow-control constructs, including other IF statements. Each IF must be terminated by its own END IF followed by a semicolon. You can use indentation. Your if statement is correctly formed. It's the alter table statement that has syntax errors. – Eric Leschinski Dec 7 '13 at 5:24. 2. IF Function in MySQL. Here we have one more important concept regarding If is the use of If Function. If Function can be used in a simple SQL query or inside a procedure. It is one of the most useful functions in MySQL, It will very useful when you want if and else like condition in the query like.

There is also a CASE expr, which differs from the CASE statement described here. See Section 12.4, “Control Flow Functions”.The CASE statement cannot have an ELSE NULL clause, and it is terminated with END CASE instead of END. Compound Statement Syntax. BEGIN. END Compound Statement. Statement Labels. DECLARE Statement. END [end_label] BEGIN. END syntax is used for writing compound statements, which can appear within stored programs stored procedures and functions,. In the mysql command-line client, this is handled with the delimiter command.

MySQL SELECT within IF statement. The following MySQL statement returns the book name, isbn no and a column alias Page/Price of an expression from the book_mast table. The Page/Price will be Price when the number of other language than English is more than the language English other wise the Page/Price will be Pages and no_page. mysql functions. string functions ascii char_length character_length concat concat_ws field find_in_set format insert instr lcase left length locate lower lpad ltrim mid position repeat replace reverse right rpad rtrim space strcmp substr substring substring_index trim ucase upper numeric functions abs acos asin atan atan2 avg ceil ceiling cos. 01.09.2017 · Mysql的if 既可以作为. select CASE sva WHEN 1 THEN '男' ELSE '女' END as ssva from taname where sva != '' 在第一个方案的返回结果中, value=compare-value。而第二个方案的返回结果是第一种情况的真实结果。.

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