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Check if a temporary table exists and delete if it exists before creating a temporary table
I am using the following code to check if the temporary table exists and drop the table if it exists before creating again. It works fine as long as I don't change the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
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How can I get enum possible values in a MySQL database?
...ou. It also strips the quotes from the values.
function get_enum_values( $table, $field )
{
$type = $this->db->query( "SHOW COLUMNS FROM {$table} WHERE Field = '{$field}'" )->row( 0 )->Type;
preg_match("/^enum\(\'(.*)\'\)$/", $type, $matches);
$enum = explode("','", $matches...
Any way to select without causing locking in MySQL?
...h-nolock.aspx
in MS SQL Server you would do the following:
SELECT * FROM TABLE_NAME WITH (nolock)
and the MYSQL equivalent is
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED ;
SELECT * FROM TABLE_NAME ;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ ;
EDIT
Michael Mior sugg...
Android NDK C++ JNI (no implementation found for native…)
...uage declaration must be replaced with "_1" in the native declaration. See table 2-1 in docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/… .
– fadden
Jul 28 '17 at 16:05
1...
What is the purpose of setting a key in data.table?
I am using data.table and there are many functions which require me to set a key (e.g. X[Y] ). As such, I wish to understand what a key does in order to properly set keys in my data tables.
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SQL query to find record with ID not in another table
I have two tables with binding primary key in database and I desire to find a disjoint set between them. For example,
6 Ans...
updating table rows in postgres using subquery
Using postgres 8.4, My goal is to update existing table:
6 Answers
6
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How do I use IValidatableObject?
I understand that IValidatableObject is used to validate an object in a way that lets one compare properties against each other.
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SQL injection that gets around mysql_real_escape_string()
...:
$iId = mysql_real_escape_string("1 OR 1=1");
$sSql = "SELECT * FROM table WHERE id = $iId";
mysql_real_escape_string() will not protect you against this.
The fact that you use single quotes (' ') around your variables inside your query is what protects you against this. The following is als...
Multiple Models in a single django ModelForm?
...onship. Such as a company where you add employees. I am trying combine 2 tables into one single form. It is a one to one relationship.
– Jason Webb
May 5 '10 at 14:02
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