-- create CREATE TABLE browser_session ( php_session_id VARCHAR(256) PRIMARY KEY, username TEXT NOT NULL, user_agent VARCHAR(4096) NOT NULL, authenticated_at bigint NOT NULL DEFAULT (UNIX_TIMESTAMP()*1000+FLOOR(MICROSECOND(UTC_TIME(3))*0.001)) ); -- insert INSERT INTO browser_session (php_session_id, username, user_agent) VALUES ('bcfca740e569a2d1972a30522fa2812c', 'admin', 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_4_4) AppleWebKit/535.14 (KHTML, like Gecko) Chrome/55.0.2797.153 Safari/602'); -- fetch SELECT * FROM browser_session;
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MariaDB is a community developed, open source relational database management system.
CREATE command is used to create a table, schema or an index.
CREATE TABLE table_name (
column1 datatype,
column2 datatype,
....);
ALTER command is used to add, modify or delete columns or constraints from the database table.
ALTER TABLE Table_name ADD column_name datatype;
TRUNCATE command is used to delete the data present in the table but this will not delete the table.
TRUNCATE table table_name;
DROP command is used to delete the table along with its data.
DROP TABLE table_name;
RENAME command is used to rename the table name.
ALTER TABLE table_name1 RENAME to new_table_name1;
INSERT Statement is used to insert new records into the database table.
INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);
Select statement is used to select data from database tables.
SELECT column1, column2, ...
FROM table_name;
UPDATE statement is used to modify the existing values of records present in the database table.
UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;
DELETE statement is used to delete the existing records present in the database table.
DELETE FROM table_name where condition;