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18 mar 2014 · In MySQL, can I select columns only where something exists? For example, I have the following query: select phone, phone2 from jewishyellow.users where phone like '813%' and phone2
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.
The COUNTA and ISBLANK methods won't work if you want to handle these sorts of cells as blanks, since those two formulas look for truly empty cells. To handle formulas which output "", you have two options: If you always know the size of your range, you can use either of the following: =IF( COUNTBLANK(BM2:BQ2)=5, "", "Major Milestone Due")
2 lut 2024 · To ascertain if a column is empty or null in SQL, use COALESCE (column, ”) or column IS NULL OR column = ”. These queries fetch rows where the specified column contains an empty string or null value, ensuring comprehensive coverage of both scenarios.
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');
WHERE Syntax. SELECT column1, column2, ... FROM table_name. WHERE condition; Note: The WHERE clause is not only used in. SELECT statements, it is also used in UPDATE, DELETE, etc.!
6 cze 2024 · We can use the function NULLIF to compare and check if the column contains null or empty values: SELECT id, name FROM Department WHERE NULLIF(TRIM(code), '') IS NULL; The NULLIF function evaluates its two arguments, returning NULL if they are equal.
