mysql - Most efficient way to count how many rows have been entered in different tables within the X days? -


given several tables, best way take poll of row counts in tables clauses included? i'd @ once can inserted table daily record of row counts.

tablea - count of rows fit condition 1, specific column value x select count(*) tablea col1 = x

tablea - count of rows fit condition 2, specific column value y select count(*) tablea col2 = y

these 2 combined into:

select (select count(*) tablea col1 = x) 'x count', (select count(*) tablea col2 = y) 'y count'

but i'd add in: tableb - count of rows created within last specified interval

select count(*) tableb datecreated >= date_sub(curdate(), interval 1 day) col3 = z;

this gives me:

select (select count(*) tablea col1 = x) 'x count', (select count(*) tablea col2 = y) 'y count', (select count(*) tableb datecreated >= date_sub(curdate(), interval 1 day)) 'z count';

it seems run though, there more efficient way of counting rows in case?

your query looks fine, should index on columns. so, the documentation:

create index idx_col1 on tablea (col1); create index idx_col2 on tablea (col2); create index idx_datecreated on tableb (datecreated);

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