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MySQL
Below are the most used MySQL commands:
For creating a table:
CREATE TABLE example (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER);
To grab everything from the table
SELECT * FROM example;
To get the number of rows from the table
SELECT COUNT(1) FROM example;
To insert a row into the table
INSERT INTO example (name, age) VALUES (‘veer’, 27);
To delete the row from the table
DELETE FROM example WHERE name = ‘veer’;
Updating a record
UPDATE example SET age = 30 WHERE name = ‘veer’;
Fetching rows on some condition
SELECT * FROM example WHERE name LIKE ‘%veer%’;
Fetching rows on multiple conditions
SELECT * FROM example WHERE (name LIKE '%veer%') AND (age > 25);
Fetching data only for selected fields
SELECT name, age FROM example where age > 25;
Explaining the execution plan of the query. It’s particularly useful if you need to figure out why a query is so slow.
EXPLAIN SELECT * FROM example;
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