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Deleting all rows from a table can be very time-consuming. Some DBMS [clarification needed] offer a TRUNCATE TABLE command that works a lot quicker, as it only alters metadata and typically does not spend time enforcing constraints or firing triggers. DELETE only deletes the rows. For deleting a table entirely the DROP command can be used.
A table is a sequence, optionally supplemented by named keys: digit["two"]="2". Several table functions like table.concat will only work with the numbered values and ignore named keys. The metatable offers a large, optional set of methods for altering table behavior. For example, you can define a table to be callable like a function.
Lua provides functions to push and pop most simple C data types (integers, floats, etc.) to and from the stack, and functions to manipulate tables through the stack. The Lua stack is somewhat different from a traditional stack; the stack can be indexed directly, for example. Negative indices indicate offsets from the top of the stack.
CLIST (MVS Command List) CMS EXEC; csh and tcsh (by Bill Joy UC Berkeley) DIGITAL Command Language CLI for VMS (DEC, Compaq, HP) DOS batch language (for IBM PC DOS, pre-Windows) EXEC 2; Expect (a Unix automation and test tool) fish (a Unix shell) Hamilton C shell (a C shell for Windows) ksh (a standard Unix shell, written by David Korn) Nushell ...
This is a comparison between notable database engines for the MySQL database management system (DBMS). A database engine (or "storage engine") is the underlying software component that a DBMS uses to create, read, update and delete (CRUD) data from a database.
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This help-page, Help:Lua debugging, explains issues of writing Lua script and debugging the source code, to remove errors or improve performance. Because Lua is a "semi-compiled" interpreted language, it does not prescreen for all common syntax errors, nor detect misspelled variables, which are only found at runtime when seeing the " Script ...
Before the fire that set Melissa Lamesch 's home ablaze on Nov. 25, 2020, the day had started with excited anticipation. Melissa was due to give birth to a baby boy in just two days, and ...