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What is the difference between Views and Materialized Views in Oracle?
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What is the meaning of DISK based? Is it mean table is not part of DISK? Is it stored in a file and DISK access is faster that File access ....?
– Kanagavelu Sugumar
Sep 16 '14 at 3:55
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Easiest way to copy a table from one database to another?
What is the best method to copy the data from a table in one database to a table in another database when the databases are under different users?
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MongoDB: Combine data from multiple collections into one..how?
... Thanks, Dave. I used this technique for generating export and reporting tables for a high traffic site in production for the last 3 months without issue. Here's another article that describes a similar use of the technique: tebros.com/2011/07/…
– rmarscher
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Difference between Select Unique and Select Distinct
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Unique is a keyword used in the Create Table() directive to denote that a field will contain unique data, usually used for natural keys, foreign keys etc.
For example:
Create Table Employee(
Emp_PKey Int Identity(1, 1) Constraint PK_Employee_Emp_PKey Prim...
Is it expensive to use try-catch blocks even if an exception is never thrown?
...tln:(Ljava/lang/String;)V
17: aload_1
18: athrow
Exception table:
from to target type
0 9 8 any
}
No "GOTO".
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How to select from subquery using Laravel Query Builder?
...Abc::where(..)->groupBy(..); // Eloquent Builder instance
$count = DB::table( DB::raw("({$sub->toSql()}) as sub") )
->mergeBindings($sub->getQuery()) // you need to get underlying Query Builder
->count();
Mind that you need to merge bindings in correct order. If you have ot...
Multiple select statements in Single query
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SELECT (
SELECT COUNT(*)
FROM user_table
) AS tot_user,
(
SELECT COUNT(*)
FROM cat_table
) AS tot_cat,
(
SELECT COUNT(*)
FROM course_table
) AS tot_course
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Correct way to use StringBuilder in SQL
...ink you've misquoted it, though; surely there aren't quotes around id2 and table?)
Note that the aim (usually) is to reduce memory churn rather than total memory used, to make life a bit easier on the garbage collector.
Will that take memory equal to using String like below?
No, it'll cause m...
SELECT INTO using Oracle
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If NEW_TABLE already exists then ...
insert into new_table
select * from old_table
/
If you want to create NEW_TABLE based on the records in OLD_TABLE ...
create table new_table as
select * from old_table
/
If the purpose is...
In php, is 0 treated as empty?
...t's a core design philosophy of PHP. I agree that this is an extremely debatable choice, however, I'm not here to debate that choice with you. Within PHP's logic, empty as equivalent to == false minus notices is fine IMO. That some things should be very different in PHP than they are is a different ...