MSSQL: has no LPAD. Workaround using RIGHT(REPLICATE(pad, length) + expr, length) — replicate the pad string enough times to guarantee at
least length characters, prepend it to expr, then take the
rightmost length characters (matches LPAD's truncate-on-overflow
semantics).
DB2: has no LPAD in Db2 for LUW. Workaround using a CASE expression:
if the string is already >= target length, return it unchanged;
otherwise prepend enough of the repeated pad string (via REPEAT +
SUBSTR) to reach the target length.
SQLite: throws. SQLite has neither LPAD nor a REPEAT function, and
there is no safe single-expression workaround without a recursive CTE,
so this is not something a scalar SQL fragment can express correctly.
Left-pad a string to a target length.
LPAD(expr, length, pad).leftPad(expr, length, pad).LPAD. Workaround usingRIGHT(REPLICATE(pad, length) + expr, length)— replicate the pad string enough times to guarantee at leastlengthcharacters, prepend it toexpr, then take the rightmostlengthcharacters (matches LPAD's truncate-on-overflow semantics).LPADin Db2 for LUW. Workaround using aCASEexpression: if the string is already >= target length, return it unchanged; otherwise prepend enough of the repeated pad string (viaREPEAT+SUBSTR) to reach the target length.LPADnor aREPEATfunction, and there is no safe single-expression workaround without a recursive CTE, so this is not something a scalar SQL fragment can express correctly.