Asked  7 Months ago    Answers:  5   Viewed   27 times

I need to get rows from the database where the records are of one month. I tried this SELECT:

$result = mysql_query("SELECT * FROM my_table WHERE DATEPART('month', date_column)=11");

In database is a lot of rows that have a date in the 11. month, but i do not get any results. Can anyone help me? Thank!

 Answers

82

There is no DATEPART function in MySQL. Use MONTH(date_column) or EXTRACT(MONTH FROM date_column) instead.

Wednesday, March 31, 2021
 
Wilk
answered 7 Months ago
74

From the PHP Manual on mysqli_stmt::execute:

mysqli_stmt::execute -- mysqli_stmt_executeExecutes a prepared Query

Returns TRUE on success or FALSE on failure.


if ($stmt->execute()) { // exactly like this!
    $success = true;
}

You're doing it right... What's your dilemma?

Wednesday, March 31, 2021
 
Sauleil
answered 7 Months ago
71

This is a FAQ for InnoDB tables. See the explanation at https://phpmyadmin.readthedocs.org/en/latest/faq.html?highlight=MaxExactCount#the-number-of-rows-for-innodb-tables-is-not-correct

Saturday, May 29, 2021
 
Student
answered 5 Months ago
98

Set the UITableView property allowsSelectionDuringEditing to YES.

Friday, September 10, 2021
 
anas
answered 2 Months ago
96

The rowSums function can be used here:

RRR[rowSums(!RRR)>0]

How it works: !RRR is a matrix with TRUE at any zero. In the general case, you can replace !RRR with whatever logical condition you want to check. For example, to see if any element is equal to 3, you could take the rowSums of RRR==3.

I think rowSums(test(x))>0 is essentially the same as apply(RRR,1,function(x)any(!test(x))); both coerce the object to a matrix. I find the rowSums version easier to read and think I've heard people praise its efficiency.


For columns, similarly:

RRR[, colSums(!RRR)>0, with=FALSE]
Sunday, October 17, 2021
 
Kevin_Kinsey
answered 1 Week ago
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