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- Constraints 11228
- In SQL, constraints can be specified for tables. Constraints enforce certain properties over data that is inserted into a table. Constraints can be specified along with the schema of the table as part of the CREATE TABLE statement . In cert
...example, we could enforce that the name column does not contain spaces using the following CHECK constraint. CREATE TABLE students (name VARCHAR CHECK (NOT contains(name, ' '))); INSERT INTO students VALUES ('this name contains spaces'); Constraint Err...or: CHECK constraint failed on table students with expression CHECK((NOT contains("name", ' '))) Not Null Constraint A not-null constraint specifies that the column ca...ables are nullable. Adding NOT NULL to a column definition enforces that a column cannot contain NULL values. CREATE TABLE students (name VARCHAR NOT NULL); INSERT INTO students VALUES (NULL); Constraint Error: NOT NULL constraint failed: students.name... - https://man.mtool.work/duckdb/2.0/sql/constraints.html
- Autocomplete 7485
- The shell offers context-aware autocomplete of SQL queries through the autocomplete extension . autocomplete is triggered by pressing Tab . Multiple autocomplete suggestions can be present. You can cycle forwards through the suggestions by
...l looks at the position in the SQL statement to determine which of these autocompletions to trigger. For example: SELECT s student_id SELECT student_id F FROM SELECT student_id FROM g grades SELECT student_id FROM 'd 'data/ SELECT student_id FROM 'data/... - https://man.mtool.work/duckdb/2.0/clients/cli/autocomplete.html
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