大约有 300 项符合查询结果（耗时：0.0111秒） [XML]
How can I easily view the contents of a datatable or dataview in the immediate window
...oject:
#region Dataset -> Immediate Window
public static void printTbl(DataSet myDataset)
{
printTbl(myDataset.Tables[0]);
}
public static void printTbl(DataTable mytable)
{
for (int i = 0; i < mytable.Columns.Count; i++)
{
Debug.Write(mytable.Columns[i].ToString() + "...
PL/SQL, how to escape single quote in a string?
...
You can use literal quoting:
stmt := q'[insert into MY_TBL (Col) values('ER0002')]';
Documentation for literals can be found here.
Alternatively, you can use two quotes to denote a single quote:
stmt := 'insert into MY_TBL (Col) values(''ER0002'')';
The literal quoting mec...
Calculate age given the birth date in the format YYYYMMDD
... Date(birthDate).getTime()) / 3.15576e+10)
// today is 2018-06-13
getAge('1994-06-14') // 23
getAge('1994-06-13') // 24
I am using a year of 365.25 days (0.25 because of leap years) which are 3.15576e+10 milliseconds (365.25 * 24 * 60 * 60 * 1000) respectively.
...
How to do a FULL OUTER JOIN in MySQL?
...
This is the correct example: (SELECT ... FROM tbl1 LEFT JOIN tbl2 ...) UNION ALL (SELECT ... FROM tbl1 RIGHT JOIN tbl2 ... WHERE tbl1.col IS NULL)
– Pavle Lekic
Mar 19 '13 at 18:45
...
postgresql - sql - count of `true` values
...query to count the true values:
select count(*) filter (where myCol)
from tbl;
The above query is a bad example in that a simple WHERE clause would suffice, and is for demonstrating the syntax only. Where the FILTER clause shines is that it is easy to combine with other aggregates:
select count...
SQL Server SELECT LAST N Rows
...u can make SQL server to select last N rows using this SQL:
select * from tbl_name order by id desc limit N;
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Search All Fields In All Tables For A Specific Value (Oracle)
...elect * from $sw where $nw='val'";
done;
done;
It yields:
select * from TBL1 where DESCRIPTION='val'
select * from TBL1 where ='val'
select * from TBL2 where Name='val'
select * from TBL2 where LNG_ID='val'
And what it does is - for each table_name from user_tables get each field (from desc) an...
How to display the function, procedure, triggers source code in postgresql?
...er:
skytf=> select tgrelid from pg_trigger where tgname='insert_tbl_tmp_trigger';
tgrelid
---------
26599
(1 row)
step 2: Get the table name of the above oid !
skytf=> select oid,relname from pg_class where oid=26599;
oid | relname ...
How can I select from list of values in SQL Server
... of doing this:
SELECT DISTINCT * FROM (VALUES('a'),('b'),('a'),('v')) AS tbl(col1)
or
SELECT DISTINCT * FROM (select unnest(array['a','b', 'a','v'])) AS tbl(col1)
using array approach you can also do something like this:
SELECT DISTINCT * FROM (select unnest(string_to_array('a;b;c;d;e;f;a;b;...
MYSQL import data from csv using LOAD DATA INFILE
...r statement should look like this:
LOAD DATA INFILE 'data.csv' INTO TABLE tbl_name
FIELDS TERMINATED BY ',' ENCLOSED BY '"'
LINES TERMINATED BY '\r\n'
IGNORE 1 LINES;
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