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Select top 10 records for each category
I want to return top 10 records from each section in one query. Can anyone help with how to do it? Section is one of the columns in the table.
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Kotlin Ternary Conditional Operator
...a != null) a else b
– Deep Shah
Jan 10 '18 at 4:16
1
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Why does casting int to invalid enum value NOT throw exception?
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edited May 23 '17 at 10:31
Community♦
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answered Jun 20 '11 at 15:41
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How can I convert tabs to spaces in every file of a directory?
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– Daniel Luca CleanUnicorn
Mar 26 '13 at 10:04
98
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Difference between int32, int, int32_t, int8 and int8_t
...erry Coffin
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1
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ReSharper warns: “Static field in generic type”
... Generic<string>.Foo = 20;
Generic<object>.Foo = 10;
Console.WriteLine(Generic<string>.Foo); // 20
}
}
As you can see, Generic<string>.Foo is a different field from Generic<object>.Foo - they hold separate values.
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创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...。
首先，介绍环境。
数据库A和数据库B的版本为Oracle 10.2.0.4 for linux x86 64bit。
在数据库A上同步的表的结构如下：
create table T_MV_TEST
(
A DATE,
B DATE,
C DATE
);
alter table T_MV_TEST
add constraint PK_T_MV_TEST primary key (A,B);
这...
Getting all types in a namespace via reflection
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edited Nov 9 '16 at 10:28
caesay
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How can I turn a List of Lists into a List in Java 8?
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You can use flatMap to flatten the internal lists (after converting them to Streams) into a s...
Using LIMIT within GROUP BY to get N results per group?
...lt;maximum length>; In the OP's case, a non-issue (since the default is 1024), but by way of example, group_concat_max_len should be at least 25: 4 (max length of a year string) + 1 (separator character), times 5 (first 5 years). The strings are truncated rather than throwing an error, so watch ...