Stuck With An Oracle Sql Query Stack Overflow You should do a couple of things: create optimizer statistics for your tables and get the execution plan for the corresponding statements. in addition you should check what the wait events are when the query is stuck. We have a very complex view that finishes execution only on first time, but hungs up when run from the same session second time. complex view view with nested views, lots of inner and outer joins, multiple union all etc but no locking statements, only pure read. hangs up ctrl c after 3 minutes. hangs up.
Sql Stuck In Query In Oracle Stack Overflow Anything that takes more then a couple of seconds will start to populate the v$session longops table. you can simply open another session, use my showsql.sql to find your session (search for showsql on my site) and then query v$session longops like this:. In this post, i reviewed several common tools for troubleshooting runaway queries. in most cases the best choice is sql monitor, which is only available on 11g. for earlier database versions, there are other methods available, which have their pluses and minuses. V$sqlarea and v$sql plan are two great places to get an understanding on what’s going on under the hood. the two queries below can help you determine if something is totally off. you can also use the following query to make sure that your sql’s are actually not waiting on some weird wait event. After upgrading our database from 11g to 12c, a specific query using an external dblink hangs forever. the thing is, when i run the query from my local computer with sql developer or toad, the query finished within 3 4 seconds.
Sql Stuck In Query Using In Oracle Stack Overflow V$sqlarea and v$sql plan are two great places to get an understanding on what’s going on under the hood. the two queries below can help you determine if something is totally off. you can also use the following query to make sure that your sql’s are actually not waiting on some weird wait event. After upgrading our database from 11g to 12c, a specific query using an external dblink hangs forever. the thing is, when i run the query from my local computer with sql developer or toad, the query finished within 3 4 seconds. This is the journey sample data where it has routes and vehicle trip details, also there are columns for how many people tap on and tap off. the current load signifies the cumulative load of t on t. I've been trying to deconstruct the query in an attempt to figure out which portion of the query is causing the issue, but so far i've had no luck. i understand that a subquery which is supposed to return only one row is returning 2 or more, but i'm struggling to figure out which one it is. Never add data as an image . you are almost there. you need to put the case expression inside an aggregate function. here, you want to use sum(). job, sum(case when deptno = 10 then sal end) dept 10 data, sum(case when deptno = 20 then sal end) dept 20 data, sum(case when deptno = 30 then sal end) dept 30 data. I am trying to write a query in oracle sql where same order might have multiple modes and i want list out the orders which only has t and i mode including duplicates. if order is duplicate which ha.
Sql Stuck In Query Using In Oracle Stack Overflow This is the journey sample data where it has routes and vehicle trip details, also there are columns for how many people tap on and tap off. the current load signifies the cumulative load of t on t. I've been trying to deconstruct the query in an attempt to figure out which portion of the query is causing the issue, but so far i've had no luck. i understand that a subquery which is supposed to return only one row is returning 2 or more, but i'm struggling to figure out which one it is. Never add data as an image . you are almost there. you need to put the case expression inside an aggregate function. here, you want to use sum(). job, sum(case when deptno = 10 then sal end) dept 10 data, sum(case when deptno = 20 then sal end) dept 20 data, sum(case when deptno = 30 then sal end) dept 30 data. I am trying to write a query in oracle sql where same order might have multiple modes and i want list out the orders which only has t and i mode including duplicates. if order is duplicate which ha.
Sql Stuck In Query Using In Oracle Stack Overflow Never add data as an image . you are almost there. you need to put the case expression inside an aggregate function. here, you want to use sum(). job, sum(case when deptno = 10 then sal end) dept 10 data, sum(case when deptno = 20 then sal end) dept 20 data, sum(case when deptno = 30 then sal end) dept 30 data. I am trying to write a query in oracle sql where same order might have multiple modes and i want list out the orders which only has t and i mode including duplicates. if order is duplicate which ha.
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