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First, I know that the sql statement to update table_a using values from table_b is in the form of:
Oracle:
UPDATE table_a SET (col1, col2) = (SELECT cola, colb FROM table_b WHERE table_a.key = table_b.key) WHERE EXISTS (SELECT * FROM table_b WHERE table...
Started by Lukman on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
This ....
How the engine determines what to do is based factors like indexes and statistics, the engine will have to to a "table scan" (roughly the equivalent of "iterate") to find the right values and match them up.
Ten rows in table b.
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I feel like this might be a crazy question, and if anyone has a better idea of how to do it, by all means please let me know.
I have a .Net C# project at work that validates certain tables against the company standards they must adhere to. The tables ...
Started by ryanulit on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
table_information] (table_id, column_name, data_type, max_char_length) values (@table_id, @column.
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When doing an ALTER TABLE statement in MySQL, the whole table is read-locked for the duration of the statement. If it's a big table, that means insert or update statements could be locked for a l ng time. Is there a way to do a "hot alter", like adding...
Started by Daniel on
, 10 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
It's considered a benefit to be able to do....
If you are using MyISAM tables, to my best understanding they only do table locks operate differently.) In any case, you can copy the table to another table, alter support it.
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Ask your Facebook Friends
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Look at this:
var selection= $('table td:first-child');
In practice it selects the first row's <td> elements in the table.
When I saw it for the first time, I took it as: Select all first-child elements within all <td> in the <table>...
Started by burak ozdogan on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Think of it like.
If you wanted what you intially though it'd be something like table td > *:first-child .
Firstchild will get the TD within the table that are the first child within their parent.
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This is the full code:
def checkRow(table, r, pos, word): # done for you! for i in range(0, len(word)): if table[r][pos+i] != word[i]: return False return True
I know the bracket mean the index value (in this case r some value of the index table) but ...
Started by Jack on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
So it's the equivalent of:
foo = table[r] if foo[pos+i] != word[i]:
table[r][pos+i]
To get the pos....
It means that the value of table[r] is another array (an array within an array), which you are indexing into with [pos+i] .
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When we execute select count(*) from table_name it returns the number of rows.
What does count(1) do? What does 1 signifies over here? Is this same as count(*) as it gives the same result on execution?
Started by Nrj on
, 8 posts
by 8 people.
Answer Snippets (Read the full thread at stackoverflow):
So yes count(*) and count(1) will provide the same is the same as count(ALL... .
If you do SELECT 1 FROM table_name it will give you the number 1 for each row in the table.
SELECT * FROM table_name and SELECT 1 FROM table_name.
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Hello,
When using tables in a CSS-based layout, I've noticed if I have a table with 4 columns (2 on the side are small for spacing, 2 in the middle are for content), when I type content in one of the two middle columns, it will stay at the top, which ...
Started by dotnetdev on
, 7 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
I don't actually have an example with me (code at work), but I have a table with a row:
Tags omitted:
table border="1" tr....
Are the cells in the same table row? Posting some example source might help diagnose the problem property .
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I'd like a query that at its simplest will join 2 tables together with no other express relationship other than each row in what I will call the "pool" table will match to precisely 1 row in my other table. I don't care which row, I just want every row...
Started by Peter Oehlert on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
So can you, just try:
CREATE TABLE TestOutput (ID INT a Cross Join
If I correctly understand your data, then number of rows in the RecordsToWrite table a simple UNIQUEIDENTIFIER column....
means that I can use OUTPUT with INSERT as well.
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In Sql Server 2005, we can create temp tables one of two ways:
declare @tmp table (Col1 int, Col2 int);
or
create table #tmp (Col1 int, Col2 int);
What are the differences between the two? I have read conflicting opinions on whether @tmp still uses tempdb...
Started by Eric Z Beard on
, 11 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
This meansThe temp table (#tmp) is ....
This means is that table variables don't have column statistics, where as temp tables do.
Table variables don't participate in transactions, logging or locking.
Are a good option.
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Hey guys, I guess the title sort of explains what I am trying to achieve;
Is there a way using html/css (with relative sizing) to make a row of cells stretch the entire width of the table within which it is contained? The cells should be equal widths ...
Started by yongjieli on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Just use percentage widths and fixed table layout :
<table> <tr> <td>1</td> <td>2</td> <td>3</td> </tr> </table>
with
table { table-layout: fixed; } td { width: 33%; }
Fixed....
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