Hi there,
I have a hierarchical database that include 4 tables. Table A is the parent of B, B is Parent of C, C is parent of D. If I want to query everything in D that is associated with A.name, how do I do that? Thanks!
YanYan (0 Replies)
I'm running a bash script query and assigning the output to a variable like this:
exists=`mysql -u $USER_NAME --password=$PASSWORD -D "somedb" \
-e "SELECT * FROM somedb.sometable WHERE field1 ='$a' \
AND field2 ='$b' LIMIT 0 , 30";`
which returns something like:
echo... (2 Replies)
hello all
i have 2 columns every column in the following format
column1
2011-04-01 11:39:54
column2
2019-02-03 00:00:00
i want get difference between above data as following
2 days 11:39
how to do so ?
i tried many functions but nothing works
please advice what is the query... (6 Replies)
Say I have two tables like below..
status
HId sName dName StartTime EndTime
1 E E 9:10 10:10
2 E F 9:15 10:15
3 G H 9:17 10:00
logic
Id devName capacity free Line
1 E 123 34 1
2 E 345 ... (3 Replies)
Hello
i have created mysql query to compare to values and get difference in percentage
as following:
SELECT file_name, 100 - ((100 * (SELECT file_count FROM xipi_files z WHERE x.file_group = z.file_group AND x.file_name = z.file_name AND z.insert_date = CURDATE( ) - INTERVAL 1 DAY)) /... (1 Reply)
Hello,
For the input file, I am trying to split those records which have multiple values seperated by '|' in the last input field, into multiple records and each record corresponds to the common input fields + one of the value from the last field.
I was trying with an example on this forum... (4 Replies)
Hi All,
i have a table in mysql with the following data
Table name Test
Assettype Serial_No Status location
Mouse 123456 In Stock chennai
Mouse 98765 Allocated chennai
Keyboard ... (2 Replies)
Hi I am trying to run a MYSQL query to display all records within a 12 month period. I have to use from_unixtime function to great a date object.
select call_start_time from call_detail_records
where call_start_time IN (
select from_unixtime(call_start_time) from call_detail_records
... (3 Replies)
Discussion started by: mojoman
3 Replies
LEARN ABOUT PHP
pg_send_query
PG_SEND_QUERY(3)PG_SEND_QUERY(3)pg_send_query - Sends asynchronous querySYNOPSIS
bool pg_send_query (resource $connection, string $query)
DESCRIPTION pg_send_query(3) sends a query or queries asynchronously to the $connection. Unlike pg_query(3), it can send multiple queries at once to
PostgreSQL and get the results one by one using pg_get_result(3).
Script execution is not blocked while the queries are executing. Use pg_connection_busy(3) to check if the connection is busy (i.e. the
query is executing). Queries may be cancelled using pg_cancel_query(3).
Although the user can send multiple queries at once, multiple queries cannot be sent over a busy connection. If a query is sent while the
connection is busy, it waits until the last query is finished and discards all its results.
PARAMETERS
o $connection
- PostgreSQL database connection resource.
o $query
- The SQL statement or statements to be executed. Data inside the query should be properly escaped.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
Use pg_get_result(3) to determine the query result.
EXAMPLES
Example #1
pg_send_query(3) example
<?php
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
if (!pg_connection_busy($dbconn)) {
pg_send_query($dbconn, "select * from authors; select count(*) from authors;");
}
$res1 = pg_get_result($dbconn);
echo "First call to pg_get_result(): $res1
";
$rows1 = pg_num_rows($res1);
echo "$res1 has $rows1 records
";
$res2 = pg_get_result($dbconn);
echo "Second call to pg_get_result(): $res2
";
$rows2 = pg_num_rows($res2);
echo "$res2 has $rows2 records
";
?>
The above example will output:
First call to pg_get_result(): Resource id #3
Resource id #3 has 3 records
Second call to pg_get_result(): Resource id #4
Resource id #4 has 1 records
SEE ALSO pg_query(3), pg_cancel_query(3), pg_get_result(3), pg_connection_busy(3).
PHP Documentation Group PG_SEND_QUERY(3)