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Change auto increment starting number?
...n use ALTER TABLE to change the auto_increment initial value:
ALTER TABLE tbl AUTO_INCREMENT = 5;
See the MySQL reference for more details.
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How to escape single quotes in MySQL
...mit(false);
PreparedStatement prepped = conn.prepareStatement("INSERT INTO tbl(fileinfo) VALUES(?)");
String line = null;
while ((line = br.readLine()) != null) {
prepped.setString(1, line);
prepped.executeQuery();
}
conn.commit();
conn.close();
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MySQL offset infinite rows
...ment
retrieves all rows from the 96th row
to the last:
SELECT * FROM tbl LIMIT 95, 18446744073709551615;
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How can I find non-ASCII characters in MySQL?
... more non-ascii characters. This helped me for the most part SELECT * FROM tbl WHERE colname NOT REGEXP '^[A-Za-z0-9\.,@&\(\) \-]*$';
– Frank Forte
Oct 16 '15 at 21:00
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How can I get enum possible values in a MySQL database?
...etermine all possible
values for an ENUM column, use SHOW
COLUMNS FROM tbl_name LIKE enum_col
and parse the ENUM definition in the
Type column of the output.
You would want something like:
$sql = "SHOW COLUMNS FROM `table` LIKE 'column'";
$result = $db->query($sql);
$row = $result->...
What's the absurd function in Data.Void useful for?
...s parametrized by their free variables. (See papers by Bellegarde and Hook 1994, Bird and Paterson 1999, Altenkirch and Reus 1999.)
data Tm a = Var a
| Tm a :$ Tm a
| Lam (Tm (Maybe a))
You can certainly make this a Functor, capturing the notion of renaming, and a Monad cap...
DISTINCT for only one column
...l be used in the group by clause, e.g. SELECT id, max(email) AS email FROM tbl GROUP by email. In SQL server ALL columns in the SELECT clause must be in an aggregate function. This bites me every time I go back.
– Bruce Pierson
Aug 1 '18 at 15:53
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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索
App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议
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Which characters make a URL invalid?
...gnation hasn't been used for those characters since RFC 1738 (published in 1994 and already obsoleted by RFC 2368 over two decades ago), and even there, it was just a quirky synonym for "forbidden"; RFC 1738 said that "All unsafe characters must always be encoded within a URL." (emphasis mine).
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What was the strangest coding standard rule that you were forced to follow? [closed]
...but I really really hate when I have to preface database table names with 'tbl'
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answered Oct 20 '08 at 11:41
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