Query Inception: When Your Query Is So Query It Queries Itself

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This meme is peak database chaos energy! Changing your name to " OR ""=" is basically the digital equivalent of bringing a skeleton key to a database party. When a poorly secured system tries to query your name, it'll execute SELECT * FROM users WHERE name = "" OR ""="" which—surprise!—evaluates to TRUE for every record. Suddenly you're not just accessing your account, you're accessing EVERYONE'S account. It's like telling the bouncer "I'm either on the list OR 2=2" and watching them let you into every VIP room simultaneously. Database developers everywhere just felt a cold shiver down their spine.

Content 192 EXERCISES SECTION 5.5.2 (. 190 , only for duplicated words that start with an uppercase letter. 5.5.3 The goto Statement A goto statement provides an unconditional jump from the goto to Best Programs should not use gotos. gotos make programs hard to u stand and hard to modify. mant 18 goto label; where label is an identifier that identifies a statement. A labeled statement isany statement that is preceded by an identifier followed by a colon: end: return; labeled statement; may be the target of a goto Label identifiers are independent of names used for variables and other identifiers. Hence, a label may have the same identifier as another entity in the program with out interfering with the other uses of that identifier. The goto and the labeled statement to which it transfers control must be in the same function. As with a switch statement, a goto cannot transfer control from a point where an initialized variable is out of scope to a point where that variable is in scope: goto end; end: int ix 10; error: goto bypasses an initialized variable definition ix 42; error: code here could use ix but the got o bypassed its declaration 4 jump backward over an already executed definition is okay. Jumping bask loa pon-before a variables defined escued definition is okay lump liger I backward jump over an initialized variable definition is okay begin: int sz getsize (); if (sz 0) goto begin; Here an is destroved when the ante event. when control naccos hast. . a anew

Ah, the classic "shoot the messenger" scenario, but make it tech! The script is pointing a gun at the API, which is desperately trying to shield the database from the incoming barrage of requests. For those who've ever written a script that hammered an API with requests until the database server caught fire, this hits different. Your innocent-looking for-loop just became a Tommy gun, and suddenly you're the villain in your own infrastructure gangster movie. Next time your DBA asks why the server crashed at 2PM, just show them this and slowly back away while maintaining eye contact.

Behold, the revolutionary idea that would fix SQL forever! Moving SELECT to the end of queries so there's actually context before listing what you want. Because apparently writing queries in the logical order of "Hey database, I want these columns FROM this table WHERE these conditions apply" was too straightforward. Next brilliant innovation: putting your function's return type after the closing bracket. The committee will review your proposal right after they finish indexing their coffee mugs by color.

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