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DWA 2

DWA 2. Lesson 04. MySQL – osnovni SQL izrazi. INSERT UPDATE DELETE SELECT (najvažniji, najkorišteniji, ali i najsloženiji izraz). 1. INSERT – unos podataka.

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DWA 2

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  1. DWA 2 Lesson 04

  2. MySQL – osnovni SQL izrazi • INSERT • UPDATE • DELETE • SELECT (najvažniji, najkorišteniji, ali i najsloženiji izraz)

  3. 1. INSERT – unos podataka • INSERT [INTO] table [(column1, column2, column3, ...)] VALUES (value1, value2, value3, ...), (value4, value5, value6, ...); • insert into customers (name, city) values ('Melissa Jones', 'Nar Nar Goon North');

  4. 2. UPDATE • UPDATE [LOW_PRIORITY] [IGNORE] table_reference SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ... [WHERE where_condition] [ORDER BY ...] [LIMIT row_count] • update customers set address = '250 Olsens Road‘ where customerid = 4;

  5. 3. DELETE • DELETE [LOW_PRIORITY] [QUICK] [IGNORE] FROM tbl_name [WHERE where_condition] [ORDER BY ...] [LIMIT row_count] • DELETE FROM somelog WHERE user = 'jcole' ORDER BY timestamp_column LIMIT 1;

  6. 4. SELECT • SELECT [ALL | DISTINCT | DISTINCTROW ] [HIGH_PRIORITY] [STRAIGHT_JOIN] [SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT] [SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS] select_expr [, select_expr ...] [FROM table_references [WHERE where_condition] [GROUP BY {col_name | expr | position} [ASC | DESC], ... [WITH ROLLUP]] [HAVING where_condition] [ORDER BY {col_name | expr | position} [ASC | DESC], ...] [LIMIT {[offset,] row_count | row_count OFFSET offset}] [PROCEDURE procedure_name(argument_list)] [INTO OUTFILE 'file_name' export_options | INTO DUMPFILE 'file_name' | INTO @var_name [, @var_name]] [FOR UPDATE | LOCK IN SHARE MODE]] • http://dev.mysql.com/doc/refman/4.1/en/select.html

  7. 4. SELECT PRIMJERI • SELECT * FROM books; • $row = $r->fetch_array() // echo $row[0] • SELECT id,name FROM books; • $row = $r->fetch_assoc() // echo $row[‘id’] • SELECT id,name,price FROM books ORDER BY price DESC;

  8. 4. SELECT PRIMJERI • SELECT AVG(price) FROM books; • SELECT COUNT(*) AS broj_knjiga FROM books; • // echo $row[‘broj_knjiga’] • SELECT CONCAT(f_name,’, ‘,l_name) AS ime_prez FROM people;

  9. 4. SELECT - SPAJANJA • SELECT t1.name, t2.salary FROM employee AS t1, info AS t2 WHERE t1.name = t2.name; • SELECT college, region AS r, seed AS s FROM tournament ORDER BY r, s;

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