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31 maj 2013 · For DBMSs that treat '' as a value (not null), Vinko's query works: select name,age from members where name is not null and name <> ''. For Oracle, which treats '' as a null, tha above doesn't work but this does: select name,age from members where name is not null.
21 sie 2010 · I'm having a problem where when I try to select the rows that have a NULL for a certain column, it returns an empty set. However, when I look at the table in phpMyAdmin, it says null for most of the rows.
I have a formula where I am checking for a range of cells whether or not they are blank. If all of them are blank I want to return another blank. If any of the cells in the range are not blank, I want to return a value Major Milestone Due. Here is the formula I currently have: =IF(ISBLANK(BM2:BQ2),"","Major Milestone Due")
2 lut 2024 · To determine if a column is empty or null in MySQL, we utilize the IS NULL and IS NOT NULL conditions in a SELECT statement. To ascertain if a column is empty or null in SQL, use COALESCE (column, ”) or column IS NULL OR column = ”.
6 cze 2024 · The IS NULL operator checks whether the column contains null values. To detect empty values within the column, we compare it against the empty string (”). Sometimes, a column might contain values that consist only of spaces, especially when data is imported from various sources.
This tutorial shows you how to use MySQL WHERE clause to filter rows based on specified conditions.
15 wrz 2019 · You need to do it in two steps, first generate the sql like (assuming your table is named T in schema S: select concat (' SELECT * FROM t WHERE ''a'' in (' , GROUP_CONCAT (COLUMN_NAME) , ')') from INFORMATION_SCHEMA.columns where table_schema = 's' and table_name = 't' and DATA_TYPE IN ('char','varchar');
