Question

我有一个SQL数据库，其中包含一个字符串列。里面的数据是数字，如..

$12,000,394.09
$56,874.94
$110,339,384.11

这是一个字符串列，但我想在顶部排序最低。是否有可能做到这一点？现在我只尝试了简单的..

SELECT * FROM sales ORDER BY saleamount DESC

任何帮助都会很棒。感谢

@Brian - 错误

java.sql.SQLSyntaxErrorException: ORA-00933: SQL command not properly ended      
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399)
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1059)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:522)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:257)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:587)
    at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:210)
    at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:30)
    at oracle.jdbc.driver.T4CStatement.executeForDescribe(T4CStatement.java:762)
    at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:925)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1111)
    at oracle.jdbc.driver.OracleStatement.executeQuery(OracleStatement.java:1309)
    at oracle.jdbc.driver.OracleStatementWrapper.executeQuery(OracleStatementWrapper.java:422)
    at TestServ.processRequest(TestServ.java:37)
    at TestServ.doGet(TestServ.java:116)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
    at java.lang.Thread.run(Thread.java:745)

Answer 1

您可以使用regexp_replace执行此操作以仅保留数字字符和小数点，并使用to_number将结果转换为数字：

select *
from sales
order by to_number(regexp_replace(string_num_field, '[^0-9.]+', ''))

小提琴： http://sqlfiddle.com/#!4/7d46e/2/0

Answer 2

如果您的所有字符串都具有相同的格式 - 从货币符号，逗号分隔符（如果适用）和两个小数位开始 - 那么您可以使用以下内容：

order by length(saleamount) desc,
         saleamount desc

如果您想先获得最小值，那么：

order by length(saleamount) asc,
         saleamount asc

Answer 3

这是一个没有正则表达式的老式解决方案：

select amt_usd
       , to_number(translate(amt_usd, '1234567890.,$', '1234567890.')) amt
from t23
order by 2
/

工作SQL Fiddle。

当然，如果用户在列中添加了£或其他内容，这将会中断。从这个角度看，正则表达式更安全。

使用货币排序SQL字符串列

3 个答案: