Меню сайта
Кабинет пользователя
Идентификатор пользователя
Пароль
Открытая база знаний
SQL. Memorandum.
TermDescription
ALTER TABLEALTER TABLE table_name ADD column_name datatype or ALTER TABLE table_name DROP COLUMN column_name
AND / ORSELECT column_name(s) FROM table_name WHERE condition AND|OR condition
AS (alias)SELECT column_name AS column_alias FROM table_name or SELECT column_name FROM table_name AS table_alias
BETWEENSELECT column_name(s) FROM table_name WHERE column_name BETWEEN value1 AND value2
CREATE DATABASECREATE DATABASE database_name
CREATE INDEXCREATE INDEX index_name ON table_name (column_name) or CREATE UNIQUE INDEX index_name ON table_name (column_name)
CREATE TABLECREATE TABLE table_name ( column_name1 data_type, column_name2 data_type, column_name2 data_type, ...)
CREATE VIEWCREATE VIEW view_name AS SELECT column_name(s) FROM table_name WHERE condition
DELETEDELETE FROM table_name WHERE some_column=some_value or DELETE FROM table_name DELETE * FROM table_name
DROP DATABASEDROP DATABASE database_name
DROP INDEXDROP INDEX table_name.index_name (SQL Server) DROP INDEX index_name ON table_name (MS Access) DROP INDEX index_name (DB2/Oracle) ALTER TABLE table_name DROP INDEX index_name (MySQL)
DROP TABLEDROP TABLE table_name
FULL JOINSELECT column_name(s) FROM table_name1 FULL JOIN table_name2 ON table_name1.column_name=table_name2.column_name
GROUP BYSELECT column_name, aggregate_function(column_name) FROM table_name WHERE column_name operator value GROUP BY column_name
HAVINGSELECT column_name, aggregate_function(column_name) FROM table_name WHERE column_name operator value GROUP BY column_name HAVING aggregate_function(column_name) operator value
INSELECT column_name(s) FROM table_name WHERE column_name IN (value1,value2,..)
INNER JOINSELECT column_name(s) FROM table_name1 INNER JOIN table_name2 ON table_name1.column_name=table_name2.column_name
INSERT INTOINSERT INTO table_name VALUES (value1, value2, value3,....) or INSERT INTO table_name (column1, column2, column3,...) VALUES (value1, value2, value3,....)
LEFT JOINSELECT column_name(s) FROM table_name1 LEFT JOIN table_name2 ON table_name1.column_name=table_name2.column_name
LIKESELECT column_name(s) FROM table_name WHERE column_name LIKE pattern
ORDER BYSELECT column_name(s) FROM table_name ORDER BY column_name [ASC|DESC]
RIGHT JOINSELECT column_name(s) FROM table_name1 RIGHT JOIN table_name2 ON table_name1.column_name=table_name2.column_name
SELECTSELECT column_name(s) FROM table_name
SELECT *SELECT * FROM table_name
SELECT DISTINCTSELECT DISTINCT column_name(s) FROM table_name
SELECT INTOSELECT * INTO new_table_name [IN externaldatabase] FROM old_table_name or SELECT column_name(s) INTO new_table_name [IN externaldatabase] FROM old_table_name
SELECT TOPSELECT TOP number|percent column_name(s) FROM table_name
TRUNCATE TABLETRUNCATE TABLE table_name
UNIONSELECT column_name(s) FROM table_name1 UNION SELECT column_name(s) FROM table_name2
UNION ALLSELECT column_name(s) FROM table_name1 UNION ALL SELECT column_name(s) FROM table_name2
UPDATEUPDATE table_name SET column1=value, column2=value,... WHERE some_column=some_value
WHERESELECT column_name(s) FROM table_name WHERE column_name operator value

Комментарии и вопросы

Опубликовать комментарий или вопрос

Copyright 2024 © ELTASK.COM
All rights reserved.