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Learn Oracle PL/SQL
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Create table
CREATE TABLE table_name (column_name datatype, column_name datatype);
CREATE TABLE table_name AS SELECT * FROM table_name2;
Drop table
DROP TABLE table_name;
Create view
CREATE VIEW view_name AS SELECT * FROM table_name;
Drop view
DROP VIEW view_name;
Create user
CREATE USER user_name IDENTIFIED BY user_password ;
Drop user
DROP USER user_name;
Create index
CREATE INDEX index_name ON table_name (column_name);
Drop index
DROP INDEX index_name;
Create sequence
CREATE SEQUENCE seq_name START WITH 1 INCREMENT BY 1 NOCACHE NOCYCLE;
Drop sequence
DROP SEQUENCE sequence_name;
Create synonym
CREATE [PUBLIC] SYNONYM synonym_name FOR object;
Drop synonym
DROP [ PUBLIC ] SYNONYM synonym_name;
Create role
CREATE ROLE role_name;

Drop role
DROP ROLE role_name;
Create function
CREATE OR REPLACE FUNCTION function_name
RETURN number AS
BEGIN
RETURN 1;
END;
Create function with parameter
CREATE OR REPLACE FUNCTION function_name(p_parameter varchar2)
RETURN varchar2 AS
BEGIN
RETURN p_parameter;
END;
Drop function
DROP FUNCTION function_name;
Create procedure
CREATE OR REPLACE PROCEDURE procedure_name
AS
BEGIN
DBMS_OUTPUT.PUT_LINE('Test');
END;
Create procedure with parameter
CREATE OR REPLACE PROCEDURE procedure_name (p_parameter number)
IS
BEGIN
DBMS_OUTPUT.PUT_LINE(p_parameter);
END;
Drop procedure
DROP PROCEDURE procedure_name;
Create trigger
CREATE OR REPLACE TRIGGER trigger_name
{BEFORE | AFTER | INSTEAD OF}
{INSERT | UPDATE | DELETE}
[OF column_name]
ON table_name [REFERENCING OLD AS old NEW AS new]
[FOR EACH ROW]
WHEN condition
DECLARE
-- declare statements
BEGIN
-- sql statements
-- pl/sql statements
END;

Drop trigger
DROP trigger trigger_name;
Alter trigger
ALTER TRIGGER trigger_name COMPILE;
ALTER TRIGGER trigger_name RENAME TO new_trigger_name;
ALTER TRIGGER trigger_name ENABLE;
ALTER TABLE table_name ENABLE ALL TRIGGERS;
ALTER TRIGGER trigger_name DISABLE;
ALTER TABLE table_name DISABLE ALL TRIGGERS;
Add primary key
ALTER TABLE table_name ADD CONSTRAINT constraint_name PRIMARY KEY(coll_name);
Add constraint foreign key
ALTER TABLE table1 ADD CONSTRAINT constraint_name
FOREIGN KEY (coll_name) REFERENCES table2(coll_name);
Drop constraint key
ALTER TABLE table_name DROP CONSTRAINT constraint_name;
Enable a foreign key
ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;
Disable foreign key
ALTER TABLE table_name DISABLE CONSTRAINT constraint_name;
Insert
INSERT INTO table_name VALUES (value1, value2, ...);
INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, ...);
INSERT INTO table1 (column1, column2) SELECT column1, column2 FROM table2;
Insert All
INSERT ALL
INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, ...)
SELECT * FROM dual;
Update
UPDATE table_name SET column_name = value;

UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;
Delete
DELETE FROM table_name;
DELETE FROM table_name WHERE condition;
Cartesian Products
SELECT * FROM table1, table2;
Inner Join
SELECT * FROM table1, table2 WHERE table1.id=table2.id;
Left Join
SELECT * FROM table1 LEFT JOIN table2 ON table1.id=table2.id;
Right Join
SELECT * FROM table1 RIGHT JOIN table2 ON table1.id=table2.id;
Self Join
SELECT * FROM table1 a, table1 b WHERE a.id=b.id;
Full Join
SELECT * FROM table1 FULL JOIN table2 ON table1.id=table2.id;
Full Outer Join
SELECT * FROM table1 FULL OUTER JOIN table2 ON table1.id=table2.id;
Any
SELECT * FROM table_name WHERE column_name = ANY (value1, value2);
Between
SELECT * FROM table_name WHERE column_name BETWEEN value1 AND value2;
Exists
SELECT * FROM table1 WHERE EXISTS (SELECT * FROM table2);
Not Exists
SELECT * FROM table1 WHERE NOT EXISTS (SELECT * FROM table2);
Group By
SELECT group_function(col1), col2 FROM table_name GROUP BY col2;
IN
SELECT * FROM table_name WHERE column_name IN (value1, value2);

Like
SELECT * FROM table_name WHERE column_name LIKE '%expr%';
Order By
SELECT * FROM table_name ORDER BY column_name;
Where
SELECT * FROM table_name WHERE column_name=value;
The main datatypes:
VARCHAR2
NUMBER
DATE
CHAR
PLS_INTEGER
BOOLEAN
BLOB
CLOB
Implicit Cursor
Attributes
%BULK_ROWCOUNT
%BULK_EXCEPTIONS
%ISOPEN
%FOUND
%NOTFOUND
%ROWCOUNT
Explicit Cursor
DECLARE
CURSOR c1 IS SELECT * FROM table_name;
v_var c1%ROWTYPE;
BEGIN
OPEN c1;
LOOP
FETCH c1 INTO v_var;
EXIT WHEN c1%NOTFOUND;
END LOOP;
CLOSE c1;
END;
Collection types
Index-by tables(associative arrays)
Nested tables
Varrays(variable-size arrays)
Collection Methods
EXISTS
COUNT
LIMIT
FIRST

LAST
PRIOR
NEXT
EXTEND
TRIM
DELETE
Collection Exceptions
COLLECTION_IS_NULL
NO_DATA_FOUND
SUBSCRIPT_BEYOND_COUNT
SUBSCRIPT_OUTSIDE_LIMIT
VALUE_ERROR
Types of records
Table-based
Cursor-based
User-defined
Data Dictionary
USER_ALL_TABLES
USER_OBJECTS
USER_TABLES
USER_CONSTRAINTS
USER_INDEXES
USER_PROCEDURES
USER_TRIGGERS
ALL_ALL_TABLES
ALL_OBJECTS
ALL_TABLES
ALL_CONSTRAINTS
ALL_INDEXES
ALL_PROCEDURES
ALL_TRIGGERS
Resource: www.plsql.co

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