mysql get count of rows
SELECT COUNT(*) FROM my_table;
SELECT COUNT(*) FROM my_table WHERE my_column IS NULL;
SELECT COUNT(*) FROM my_table WHERE my_column = 'my_value';
SELECT COUNT(DISTINCT tel) gender_count,
COUNT(DISTINCT CASE WHEN gender = 'male' THEN tel END) male_count,
COUNT(DISTINCT CASE WHEN gender = 'female' THEN tel END) female_count
FROM people;mysql num rows
//number of rows retrieved from a query
<?php
$link = mysql_connect("localhost", "mysql_user", "mysql_password");
mysql_select_db("database", $link);
$result = mysql_query("SELECT * FROM table1", $link);
$num_rows = mysql_num_rows($result);
echo "$num_rows Rows\n";
?>row number mysql
SELECT row_number() over ( order by firstName) RowNumberSqeuence,FirstName from rowNumberDemo
order by FirstName;get number of rows in every table mysql
mysql> SELECT table_name, table_rows
->FROM INFORMATION_SCHEMA.TABLES
->WHERE TABLE_SCHEMA = 'business';mysql select count if contains
SELECT sum( case when `tags_Column` CONTAINS 'tag2' then 1 else 0 end ) as tag2,
sum( case when `tags_Column` CONTAINS 'tag3' then 1 else 0 end ) as tag3,
.....
sum( case when `tags_Column` CONTAINS 'tag256' then 1 else 0 end ) as tag256,
sum( case when `tags_Column` CONTAINS `tag2` OR
`tags_Column` CONTAINS 'tag3`
then 0 else 1 end ) as doesnt_contains_tags_2_3
FROM `TableContainsTags`Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
