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If I type NULL, it is treated as a string literal. If I leave it blank it is treated as an empty string.
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You can use the implicit method on string fields only if you set the NullValue option to the empty string (''). The system considers a string field empty (potentially null) only if it contains truly zero characters (no spaces).
Learn MySQL from scratch for Data Science and Analytics You can insert NULL value into an int column with a condition i.e. the column must not have NOT NULL constraints. The syntax is as follows. INSERT INTO yourTableName(yourColumnName) values(NULL);
When editing the field in the Structure tab, look for the "NULL" checkbox. When un-checked, this is the equivalent of the NOT NULL statement. Show activity on this post. If you uncheck this property then it means that it is not null.
There must be a checkbox near input for setting NULL value. ( only on nullable columns )
( alternatievly, I prefer to use SQL language directly )
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