详解MyBatis中Executor执行SQL语句的过程 0); } else if (list.size() > 1) { // 查询结果大于一个时,报错 throw new TooManyResultsException(...; } else { return null; }}复制代码DefaultSqlSession的selectOne() 方法中会将查询请求交由DefaultSqlSession...= null) { // 成功命中,则返回缓存中的...
需缩进 # 缩进等级与do语法块一致 参数 elsedo : else 语句对应的python代码块 返回值 else属于语法...
步骤2:执行SQL查询语句 接下来,需要执行SQL查询语句来获取需要判断的条件。可以使用以下代码实现: -- 执行SQL查询语句 $result = $mysqli->query("SELECT * FROM 表名 WHERE 条件"); if ($result->num_rows > 0) { // 条件满足,执行语句1 } else { // 条件不满足,执行语句2 } 1. 2. 3. 4. 5...
SQL IF 1 = 2 PRINT 'Boolean expression is true.' ELSE PRINT 'Boolean expression is false.'; GO B. Use a query as part of a Boolean expression The following example executes a query as part of the Boolean expression. Because there are 10 bikes in theProducttable that meet the condition...
(stmt, statementLog, queryStack); return stmt; } else if ("prepareCall".equals(method.getName())) { if (isDebugEnabled()) { debug(" Preparing: " + removeBreakingWhitespace((String) params[0]), true); } PreparedStatement stmt = (PreparedStatement) method.invoke(connection, params); stmt ...
有这个问题:Notice: Fail 你的SQL语法有错误;检查与您的 MariaDB 服务器版本对应的手册,了解在第 1 行的 'SET post_author = case when post_author !=null then 'evgen' else null end, SET p' 附近使用的正确语法$query = "UPDATE posts SET post_title = '{$post_title}', post_tags= '{$post...
1、标准sql规范 1、单个IF IF v=... THEN END IF; 2、IF ... ELSE IF v=... THEN ELSE t...; END IF; 3、多个IF IF v=... THEN ELSIF v=... THEN t...; END IFL 注意: 多个IF的是'ELSIF' 不是' ELSE IF' 2、decode函数 DECODE(VALUE,IF1,THEN1,IF2,THEN2,IF2,THEN2,..,EL...
select @gh_num=count(jmzh) from jfxd.t_gongan_end_2 where tel is not null select @xlt_num=count(jmzh) from jfxd.t_gongan_end_2 where little_tel is not null end elseif@town='bbb' begin //sql语句 end else begin //sql语句 end update t_stat_info set…… GO...
Re: IF ELSE queryPosted by: kanishk kumar Date: March 10, 2012 02:04AM select amount as a from discount if(a=='yes') { RETURN A ) else { RETURN B } but it is not compiling its showin #1064 - You have an error in your SQL syntax; check the manual that ...
Yep, I came to the same conclusion. The actual query contains 20 tables and is used to produce a label. So it's one these options: 1) perform the query and remove the unwanted record if it exists. 2) perform all logic in a function and call it from the report writer. ...