Results for “post”
Small, practical examples. Search by task or narrow things down below.
Match a known text prefix
SQL: A percent wildcard matches zero or more characters following the prefix.
SQL✓ Tested
Match a text prefix
SQL: Use a percent wildcard after a known prefix.
SQL✓ Tested
Match one of several values
Use IN to avoid repeating equality conditions.
IN✓ Tested
Match one value from a short list
SQL: Use IN for a set of allowed values.
SQL✓ Tested
Measure the length of ordinary text
SQL: Use the engine’s text-length function; this ASCII example has no trailing spaces.
SQL✓ Tested
Name an intermediate query with a CTE
Make a filtered result reusable within one statement.
CTE✓ Tested
Normalize ASCII text to lowercase
SQL: LOWER is useful for display normalization; indexed case-insensitive search depends on the database collation and schema.
SQL✓ Tested
Normalize ASCII text to uppercase
SQL: UPPER changes character case under the database’s text rules.
SQL✓ Tested
Number rows within each group
Assign ordered row numbers with a window function.
row_number✓ Tested
Pair employees with their managers
SQL: Alias a table twice to represent two different roles in one relationship.
SQL✓ Tested
Place missing values after known values portably
SQL: A CASE sort key controls NULL placement without relying on engine-specific defaults.
SQL✓ Tested
Rank tied scores with competition gaps
SQL: RANK leaves a gap after tied rows, unlike DENSE_RANK.
SQL✓ Tested